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Finding the Fourth Proportional to 71,959.68, 99,303.84 and 39,695.04

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Solution

The fourth proportional to 71,959.68, 99,303.84 and 39,695.04 is: 54,778.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,959.68 : 99,303.84 = 39,695.04 : x
  2. Step 2: Convert to fraction form
    71,959.68/99,303.84 = 39,695.04/x
  3. Step 3: Cross multiply
    71,959.68x = 99,303.84 × 39,695.04
  4. Step 4: Simplify right side
    71,959.68x = 3,941,869,900.95
  5. Step 5: Solve for x
    x = 3,941,869,900.95/71,959.68
  6. Step 6: Final answer
    x = 54,778.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.