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Finding the Fourth Proportional to 86,810.60, 129,870.30 and 75,252.20

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Solution

The fourth proportional to 86,810.60, 129,870.30 and 75,252.20 is: 112,578.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,810.60 : 129,870.30 = 75,252.20 : x
  2. Step 2: Convert to fraction form
    86,810.60/129,870.30 = 75,252.20/x
  3. Step 3: Cross multiply
    86,810.60x = 129,870.30 × 75,252.20
  4. Step 4: Simplify right side
    86,810.60x = 9,773,025,789.66
  5. Step 5: Solve for x
    x = 9,773,025,789.66/86,810.60
  6. Step 6: Final answer
    x = 112,578.71

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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.