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Finding the Fourth Proportional to 157,128.92, 216,837.50 and 85,508.92

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Solution

The fourth proportional to 157,128.92, 216,837.50 and 85,508.92 is: 118,002.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,128.92 : 216,837.50 = 85,508.92 : x
  2. Step 2: Convert to fraction form
    157,128.92/216,837.50 = 85,508.92/x
  3. Step 3: Cross multiply
    157,128.92x = 216,837.50 × 85,508.92
  4. Step 4: Simplify right side
    157,128.92x = 18,541,540,440.50
  5. Step 5: Solve for x
    x = 18,541,540,440.50/157,128.92
  6. Step 6: Final answer
    x = 118,002.09

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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.