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Finding the Fourth Proportional to 158,732.39, 219,054.96 and 87,114.95

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Solution

The fourth proportional to 158,732.39, 219,054.96 and 87,114.95 is: 120,220.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,732.39 : 219,054.96 = 87,114.95 : x
  2. Step 2: Convert to fraction form
    158,732.39/219,054.96 = 87,114.95/x
  3. Step 3: Cross multiply
    158,732.39x = 219,054.96 × 87,114.95
  4. Step 4: Simplify right side
    158,732.39x = 19,082,961,887.65
  5. Step 5: Solve for x
    x = 19,082,961,887.65/158,732.39
  6. Step 6: Final answer
    x = 120,220.97

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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.