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Finding the Fourth Proportional to 72,350.80, 108,380.40 and 48,731.20

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Solution

The fourth proportional to 72,350.80, 108,380.40 and 48,731.20 is: 72,998.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,350.80 : 108,380.40 = 48,731.20 : x
  2. Step 2: Convert to fraction form
    72,350.80/108,380.40 = 48,731.20/x
  3. Step 3: Cross multiply
    72,350.80x = 108,380.40 × 48,731.20
  4. Step 4: Simplify right side
    72,350.80x = 5,281,506,948.48
  5. Step 5: Solve for x
    x = 5,281,506,948.48/72,350.80
  6. Step 6: Final answer
    x = 72,998.60

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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.