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Finding the Fourth Proportional to 158,609, 218,880.42 and 87,953

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Solution

The fourth proportional to 158,609, 218,880.42 and 87,953 is: 121,375.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,609 : 218,880.42 = 87,953 : x
  2. Step 2: Convert to fraction form
    158,609/218,880.42 = 87,953/x
  3. Step 3: Cross multiply
    158,609x = 218,880.42 × 87,953
  4. Step 4: Simplify right side
    158,609x = 19,251,189,580.26
  5. Step 5: Solve for x
    x = 19,251,189,580.26/158,609
  6. Step 6: Final answer
    x = 121,375.14

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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.