Home / 129,640.24-178,915.26-75,943.72

Finding the Fourth Proportional to 129,640.24, 178,915.26 and 75,943.72

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Solution

The fourth proportional to 129,640.24, 178,915.26 and 75,943.72 is: 104,809.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,640.24 : 178,915.26 = 75,943.72 : x
  2. Step 2: Convert to fraction form
    129,640.24/178,915.26 = 75,943.72/x
  3. Step 3: Cross multiply
    129,640.24x = 178,915.26 × 75,943.72
  4. Step 4: Simplify right side
    129,640.24x = 13,587,490,409.17
  5. Step 5: Solve for x
    x = 13,587,490,409.17/129,640.24
  6. Step 6: Final answer
    x = 104,809.20

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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.