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Finding the Fourth Proportional to 158,903.56, 219,281.01 and 87,279.31

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Solution

The fourth proportional to 158,903.56, 219,281.01 and 87,279.31 is: 120,442.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,903.56 : 219,281.01 = 87,279.31 : x
  2. Step 2: Convert to fraction form
    158,903.56/219,281.01 = 87,279.31/x
  3. Step 3: Cross multiply
    158,903.56x = 219,281.01 × 87,279.31
  4. Step 4: Simplify right side
    158,903.56x = 19,138,695,248.90
  5. Step 5: Solve for x
    x = 19,138,695,248.90/158,903.56
  6. Step 6: Final answer
    x = 120,442.21

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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.