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Finding the Fourth Proportional to 157,348.56, 217,141.02 and 85,728.57

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Solution

The fourth proportional to 157,348.56, 217,141.02 and 85,728.57 is: 118,305.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,348.56 : 217,141.02 = 85,728.57 : x
  2. Step 2: Convert to fraction form
    157,348.56/217,141.02 = 85,728.57/x
  3. Step 3: Cross multiply
    157,348.56x = 217,141.02 × 85,728.57
  4. Step 4: Simplify right side
    157,348.56x = 18,615,189,132.94
  5. Step 5: Solve for x
    x = 18,615,189,132.94/157,348.56
  6. Step 6: Final answer
    x = 118,305.43

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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.