Home / 129,440.78-178,627.91-72,852.15

Finding the Fourth Proportional to 129,440.78, 178,627.91 and 72,852.15

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Solution

The fourth proportional to 129,440.78, 178,627.91 and 72,852.15 is: 100,535.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,440.78 : 178,627.91 = 72,852.15 : x
  2. Step 2: Convert to fraction form
    129,440.78/178,627.91 = 72,852.15/x
  3. Step 3: Cross multiply
    129,440.78x = 178,627.91 × 72,852.15
  4. Step 4: Simplify right side
    129,440.78x = 13,013,426,929.25
  5. Step 5: Solve for x
    x = 13,013,426,929.25/129,440.78
  6. Step 6: Final answer
    x = 100,535.76

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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.