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Finding the Fourth Proportional to 157,410.29, 217,224.83 and 85,790.30

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Solution

The fourth proportional to 157,410.29, 217,224.83 and 85,790.30 is: 118,389.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,410.29 : 217,224.83 = 85,790.30 : x
  2. Step 2: Convert to fraction form
    157,410.29/217,224.83 = 85,790.30/x
  3. Step 3: Cross multiply
    157,410.29x = 217,224.83 × 85,790.30
  4. Step 4: Simplify right side
    157,410.29x = 18,635,781,818.07
  5. Step 5: Solve for x
    x = 18,635,781,818.07/157,410.29
  6. Step 6: Final answer
    x = 118,389.86

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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.