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Finding the Fourth Proportional to 158,980.55, 219,390.65 and 87,359.04

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Solution

The fourth proportional to 158,980.55, 219,390.65 and 87,359.04 is: 120,554.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,980.55 : 219,390.65 = 87,359.04 : x
  2. Step 2: Convert to fraction form
    158,980.55/219,390.65 = 87,359.04/x
  3. Step 3: Cross multiply
    158,980.55x = 219,390.65 × 87,359.04
  4. Step 4: Simplify right side
    158,980.55x = 19,165,755,472.02
  5. Step 5: Solve for x
    x = 19,165,755,472.02/158,980.55
  6. Step 6: Final answer
    x = 120,554.09

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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.