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Finding the Fourth Proportional to 151,732.59, 209,359.72 and 87,189.36

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Solution

The fourth proportional to 151,732.59, 209,359.72 and 87,189.36 is: 120,303.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,732.59 : 209,359.72 = 87,189.36 : x
  2. Step 2: Convert to fraction form
    151,732.59/209,359.72 = 87,189.36/x
  3. Step 3: Cross multiply
    151,732.59x = 209,359.72 × 87,189.36
  4. Step 4: Simplify right side
    151,732.59x = 18,253,938,513.83
  5. Step 5: Solve for x
    x = 18,253,938,513.83/151,732.59
  6. Step 6: Final answer
    x = 120,303.35

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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.