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Finding the Fourth Proportional to 48,240, 72,318.15 and 18,679.32

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Solution

The fourth proportional to 48,240, 72,318.15 and 18,679.32 is: 28,002.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,240 : 72,318.15 = 18,679.32 : x
  2. Step 2: Convert to fraction form
    48,240/72,318.15 = 18,679.32/x
  3. Step 3: Cross multiply
    48,240x = 72,318.15 × 18,679.32
  4. Step 4: Simplify right side
    48,240x = 1,350,853,865.66
  5. Step 5: Solve for x
    x = 1,350,853,865.66/48,240
  6. Step 6: Final answer
    x = 28,002.77

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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.