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Finding the Fourth Proportional to 157,590.88, 217,475.92 and 85,972.40

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Solution

The fourth proportional to 157,590.88, 217,475.92 and 85,972.40 is: 118,642.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,590.88 : 217,475.92 = 85,972.40 : x
  2. Step 2: Convert to fraction form
    157,590.88/217,475.92 = 85,972.40/x
  3. Step 3: Cross multiply
    157,590.88x = 217,475.92 × 85,972.40
  4. Step 4: Simplify right side
    157,590.88x = 18,696,926,620.23
  5. Step 5: Solve for x
    x = 18,696,926,620.23/157,590.88
  6. Step 6: Final answer
    x = 118,642.19

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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.