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Finding the Fourth Proportional to 157,699.53, 217,592.87 and 90,618.57

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Solution

The fourth proportional to 157,699.53, 217,592.87 and 90,618.57 is: 125,034.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,699.53 : 217,592.87 = 90,618.57 : x
  2. Step 2: Convert to fraction form
    157,699.53/217,592.87 = 90,618.57/x
  3. Step 3: Cross multiply
    157,699.53x = 217,592.87 × 90,618.57
  4. Step 4: Simplify right side
    157,699.53x = 19,717,954,268.50
  5. Step 5: Solve for x
    x = 19,717,954,268.50/157,699.53
  6. Step 6: Final answer
    x = 125,034.96

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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.