Home / 86,589.30-129,920.40-47,174.70

Finding the Fourth Proportional to 86,589.30, 129,920.40 and 47,174.70

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Solution

The fourth proportional to 86,589.30, 129,920.40 and 47,174.70 is: 70,781.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,589.30 : 129,920.40 = 47,174.70 : x
  2. Step 2: Convert to fraction form
    86,589.30/129,920.40 = 47,174.70/x
  3. Step 3: Cross multiply
    86,589.30x = 129,920.40 × 47,174.70
  4. Step 4: Simplify right side
    86,589.30x = 6,128,955,893.88
  5. Step 5: Solve for x
    x = 6,128,955,893.88/86,589.30
  6. Step 6: Final answer
    x = 70,781.91

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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.