Home / 52,154.92-78,243.10-20,990.12

Finding the Fourth Proportional to 52,154.92, 78,243.10 and 20,990.12

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Solution

The fourth proportional to 52,154.92, 78,243.10 and 20,990.12 is: 31,489.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,154.92 : 78,243.10 = 20,990.12 : x
  2. Step 2: Convert to fraction form
    52,154.92/78,243.10 = 20,990.12/x
  3. Step 3: Cross multiply
    52,154.92x = 78,243.10 × 20,990.12
  4. Step 4: Simplify right side
    52,154.92x = 1,642,332,058.17
  5. Step 5: Solve for x
    x = 1,642,332,058.17/52,154.92
  6. Step 6: Final answer
    x = 31,489.49

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Half scale
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Double scale
Find fourth proportional to 52,155.92, 78,244.60 and 20,991.12
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.