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Finding the Fourth Proportional to 72,305.80, 108,458.70 and 48,686.20

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Solution

The fourth proportional to 72,305.80, 108,458.70 and 48,686.20 is: 73,029.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,305.80 : 108,458.70 = 48,686.20 : x
  2. Step 2: Convert to fraction form
    72,305.80/108,458.70 = 48,686.20/x
  3. Step 3: Cross multiply
    72,305.80x = 108,458.70 × 48,686.20
  4. Step 4: Simplify right side
    72,305.80x = 5,280,441,959.94
  5. Step 5: Solve for x
    x = 5,280,441,959.94/72,305.80
  6. Step 6: Final answer
    x = 73,029.30

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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.