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Finding the Fourth Proportional to 109,068.80, 163,610.04 and 42,486.80

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Solution

The fourth proportional to 109,068.80, 163,610.04 and 42,486.80 is: 63,732.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,068.80 : 163,610.04 = 42,486.80 : x
  2. Step 2: Convert to fraction form
    109,068.80/163,610.04 = 42,486.80/x
  3. Step 3: Cross multiply
    109,068.80x = 163,610.04 × 42,486.80
  4. Step 4: Simplify right side
    109,068.80x = 6,951,267,047.47
  5. Step 5: Solve for x
    x = 6,951,267,047.47/109,068.80
  6. Step 6: Final answer
    x = 63,732.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.