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Finding the Fourth Proportional to 159,505.30, 220,117.12 and 87,885.30

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Solution

The fourth proportional to 159,505.30, 220,117.12 and 87,885.30 is: 121,281.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,505.30 : 220,117.12 = 87,885.30 : x
  2. Step 2: Convert to fraction form
    159,505.30/220,117.12 = 87,885.30/x
  3. Step 3: Cross multiply
    159,505.30x = 220,117.12 × 87,885.30
  4. Step 4: Simplify right side
    159,505.30x = 19,345,059,126.34
  5. Step 5: Solve for x
    x = 19,345,059,126.34/159,505.30
  6. Step 6: Final answer
    x = 121,281.61

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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.