Home / 87,706.43-121,034.85-47,420.19

Finding the Fourth Proportional to 87,706.43, 121,034.85 and 47,420.19

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Solution

The fourth proportional to 87,706.43, 121,034.85 and 47,420.19 is: 65,439.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,706.43 : 121,034.85 = 47,420.19 : x
  2. Step 2: Convert to fraction form
    87,706.43/121,034.85 = 47,420.19/x
  3. Step 3: Cross multiply
    87,706.43x = 121,034.85 × 47,420.19
  4. Step 4: Simplify right side
    87,706.43x = 5,739,495,583.62
  5. Step 5: Solve for x
    x = 5,739,495,583.62/87,706.43
  6. Step 6: Final answer
    x = 65,439.85

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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.