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Finding the Fourth Proportional to 48,607.80, 72,911.70 and 45,327.30

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Solution

The fourth proportional to 48,607.80, 72,911.70 and 45,327.30 is: 67,990.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,607.80 : 72,911.70 = 45,327.30 : x
  2. Step 2: Convert to fraction form
    48,607.80/72,911.70 = 45,327.30/x
  3. Step 3: Cross multiply
    48,607.80x = 72,911.70 × 45,327.30
  4. Step 4: Simplify right side
    48,607.80x = 3,304,890,499.41
  5. Step 5: Solve for x
    x = 3,304,890,499.41/48,607.80
  6. Step 6: Final answer
    x = 67,990.95

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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.