Home / 129,531.87-178,722.86-72,943.23

Finding the Fourth Proportional to 129,531.87, 178,722.86 and 72,943.23

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Solution

The fourth proportional to 129,531.87, 178,722.86 and 72,943.23 is: 100,644.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,531.87 : 178,722.86 = 72,943.23 : x
  2. Step 2: Convert to fraction form
    129,531.87/178,722.86 = 72,943.23/x
  3. Step 3: Cross multiply
    129,531.87x = 178,722.86 × 72,943.23
  4. Step 4: Simplify right side
    129,531.87x = 13,036,622,318.52
  5. Step 5: Solve for x
    x = 13,036,622,318.52/129,531.87
  6. Step 6: Final answer
    x = 100,644.13

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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.