Home / 86,520.30-129,708.45-36,638.70

Finding the Fourth Proportional to 86,520.30, 129,708.45 and 36,638.70

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Solution

The fourth proportional to 86,520.30, 129,708.45 and 36,638.70 is: 54,927.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,520.30 : 129,708.45 = 36,638.70 : x
  2. Step 2: Convert to fraction form
    86,520.30/129,708.45 = 36,638.70/x
  3. Step 3: Cross multiply
    86,520.30x = 129,708.45 × 36,638.70
  4. Step 4: Simplify right side
    86,520.30x = 4,752,348,987.02
  5. Step 5: Solve for x
    x = 4,752,348,987.02/86,520.30
  6. Step 6: Final answer
    x = 54,927.56

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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.