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Finding the Fourth Proportional to 151,751.70, 209,424.35 and 87,241.88

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Solution

The fourth proportional to 151,751.70, 209,424.35 and 87,241.88 is: 120,397.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,751.70 : 209,424.35 = 87,241.88 : x
  2. Step 2: Convert to fraction form
    151,751.70/209,424.35 = 87,241.88/x
  3. Step 3: Cross multiply
    151,751.70x = 209,424.35 × 87,241.88
  4. Step 4: Simplify right side
    151,751.70x = 18,270,574,753.44
  5. Step 5: Solve for x
    x = 18,270,574,753.44/151,751.70
  6. Step 6: Final answer
    x = 120,397.83

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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.