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Finding the Fourth Proportional to 151,354.44, 208,869.15 and 87,729.15

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Solution

The fourth proportional to 151,354.44, 208,869.15 and 87,729.15 is: 121,066.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,354.44 : 208,869.15 = 87,729.15 : x
  2. Step 2: Convert to fraction form
    151,354.44/208,869.15 = 87,729.15/x
  3. Step 3: Cross multiply
    151,354.44x = 208,869.15 × 87,729.15
  4. Step 4: Simplify right side
    151,354.44x = 18,323,912,990.72
  5. Step 5: Solve for x
    x = 18,323,912,990.72/151,354.44
  6. Step 6: Final answer
    x = 121,066.24

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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.