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Finding the Fourth Proportional to 159,001.68, 219,426.12 and 87,388.50

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Solution

The fourth proportional to 159,001.68, 219,426.12 and 87,388.50 is: 120,598.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,001.68 : 219,426.12 = 87,388.50 : x
  2. Step 2: Convert to fraction form
    159,001.68/219,426.12 = 87,388.50/x
  3. Step 3: Cross multiply
    159,001.68x = 219,426.12 × 87,388.50
  4. Step 4: Simplify right side
    159,001.68x = 19,175,319,487.62
  5. Step 5: Solve for x
    x = 19,175,319,487.62/159,001.68
  6. Step 6: Final answer
    x = 120,598.22

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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.