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Finding the Fourth Proportional to 86,486.64, 129,689.64 and 44,922.48

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Solution

The fourth proportional to 86,486.64, 129,689.64 and 44,922.48 is: 67,362.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,486.64 : 129,689.64 = 44,922.48 : x
  2. Step 2: Convert to fraction form
    86,486.64/129,689.64 = 44,922.48/x
  3. Step 3: Cross multiply
    86,486.64x = 129,689.64 × 44,922.48
  4. Step 4: Simplify right side
    86,486.64x = 5,825,980,259.11
  5. Step 5: Solve for x
    x = 5,825,980,259.11/86,486.64
  6. Step 6: Final answer
    x = 67,362.78

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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.