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Finding the Fourth Proportional to 86,335.76, 129,449.64 and 36,390.08

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Solution

The fourth proportional to 86,335.76, 129,449.64 and 36,390.08 is: 54,562.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,335.76 : 129,449.64 = 36,390.08 : x
  2. Step 2: Convert to fraction form
    86,335.76/129,449.64 = 36,390.08/x
  3. Step 3: Cross multiply
    86,335.76x = 129,449.64 × 36,390.08
  4. Step 4: Simplify right side
    86,335.76x = 4,710,682,755.57
  5. Step 5: Solve for x
    x = 4,710,682,755.57/86,335.76
  6. Step 6: Final answer
    x = 54,562.36

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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.