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Finding the Fourth Proportional to 157,955.81, 217,978.96 and 89,979.08

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Solution

The fourth proportional to 157,955.81, 217,978.96 and 89,979.08 is: 124,171.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,955.81 : 217,978.96 = 89,979.08 : x
  2. Step 2: Convert to fraction form
    157,955.81/217,978.96 = 89,979.08/x
  3. Step 3: Cross multiply
    157,955.81x = 217,978.96 × 89,979.08
  4. Step 4: Simplify right side
    157,955.81x = 19,613,546,280.16
  5. Step 5: Solve for x
    x = 19,613,546,280.16/157,955.81
  6. Step 6: Final answer
    x = 124,171.10

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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.