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Finding the Fourth Proportional to 157,432.36, 217,256.76 and 85,810.92

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Solution

The fourth proportional to 157,432.36, 217,256.76 and 85,810.92 is: 118,419.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,432.36 : 217,256.76 = 85,810.92 : x
  2. Step 2: Convert to fraction form
    157,432.36/217,256.76 = 85,810.92/x
  3. Step 3: Cross multiply
    157,432.36x = 217,256.76 × 85,810.92
  4. Step 4: Simplify right side
    157,432.36x = 18,643,002,451.82
  5. Step 5: Solve for x
    x = 18,643,002,451.82/157,432.36
  6. Step 6: Final answer
    x = 118,419.13

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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.