Home / 78,140.96-107,834.57-42,331.12

Finding the Fourth Proportional to 78,140.96, 107,834.57 and 42,331.12

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Solution

The fourth proportional to 78,140.96, 107,834.57 and 42,331.12 is: 58,416.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,140.96 : 107,834.57 = 42,331.12 : x
  2. Step 2: Convert to fraction form
    78,140.96/107,834.57 = 42,331.12/x
  3. Step 3: Cross multiply
    78,140.96x = 107,834.57 × 42,331.12
  4. Step 4: Simplify right side
    78,140.96x = 4,564,757,959.06
  5. Step 5: Solve for x
    x = 4,564,757,959.06/78,140.96
  6. Step 6: Final answer
    x = 58,416.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.