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Finding the Fourth Proportional to 71,078.40, 106,566.40 and 39,923.20

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Solution

The fourth proportional to 71,078.40, 106,566.40 and 39,923.20 is: 59,856.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,078.40 : 106,566.40 = 39,923.20 : x
  2. Step 2: Convert to fraction form
    71,078.40/106,566.40 = 39,923.20/x
  3. Step 3: Cross multiply
    71,078.40x = 106,566.40 × 39,923.20
  4. Step 4: Simplify right side
    71,078.40x = 4,254,471,700.48
  5. Step 5: Solve for x
    x = 4,254,471,700.48/71,078.40
  6. Step 6: Final answer
    x = 59,856.04

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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.