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Finding the Fourth Proportional to 71,920.80, 99,219.60 and 49,525.92

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Solution

The fourth proportional to 71,920.80, 99,219.60 and 49,525.92 is: 68,324.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,920.80 : 99,219.60 = 49,525.92 : x
  2. Step 2: Convert to fraction form
    71,920.80/99,219.60 = 49,525.92/x
  3. Step 3: Cross multiply
    71,920.80x = 99,219.60 × 49,525.92
  4. Step 4: Simplify right side
    71,920.80x = 4,913,941,972.03
  5. Step 5: Solve for x
    x = 4,913,941,972.03/71,920.80
  6. Step 6: Final answer
    x = 68,324.35

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1.5x scale

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.