Home / 86,621.70-129,823.20-42,152.70

Finding the Fourth Proportional to 86,621.70, 129,823.20 and 42,152.70

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Solution

The fourth proportional to 86,621.70, 129,823.20 and 42,152.70 is: 63,175.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,621.70 : 129,823.20 = 42,152.70 : x
  2. Step 2: Convert to fraction form
    86,621.70/129,823.20 = 42,152.70/x
  3. Step 3: Cross multiply
    86,621.70x = 129,823.20 × 42,152.70
  4. Step 4: Simplify right side
    86,621.70x = 5,472,398,402.64
  5. Step 5: Solve for x
    x = 5,472,398,402.64/86,621.70
  6. Step 6: Final answer
    x = 63,175.84

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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.