Home / 85,977.30-129,063.15-66,342.90

Finding the Fourth Proportional to 85,977.30, 129,063.15 and 66,342.90

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Solution

The fourth proportional to 85,977.30, 129,063.15 and 66,342.90 is: 99,589.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,977.30 : 129,063.15 = 66,342.90 : x
  2. Step 2: Convert to fraction form
    85,977.30/129,063.15 = 66,342.90/x
  3. Step 3: Cross multiply
    85,977.30x = 129,063.15 × 66,342.90
  4. Step 4: Simplify right side
    85,977.30x = 8,562,423,654.14
  5. Step 5: Solve for x
    x = 8,562,423,654.14/85,977.30
  6. Step 6: Final answer
    x = 99,589.35

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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.