Home / 78,679.95-108,577.02-42,869.85

Finding the Fourth Proportional to 78,679.95, 108,577.02 and 42,869.85

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Solution

The fourth proportional to 78,679.95, 108,577.02 and 42,869.85 is: 59,159.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,679.95 : 108,577.02 = 42,869.85 : x
  2. Step 2: Convert to fraction form
    78,679.95/108,577.02 = 42,869.85/x
  3. Step 3: Cross multiply
    78,679.95x = 108,577.02 × 42,869.85
  4. Step 4: Simplify right side
    78,679.95x = 4,654,680,560.85
  5. Step 5: Solve for x
    x = 4,654,680,560.85/78,679.95
  6. Step 6: Final answer
    x = 59,159.68

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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.