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Finding the Fourth Proportional to 48,388.80, 72,548.88 and 18,781.68

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Solution

The fourth proportional to 48,388.80, 72,548.88 and 18,781.68 is: 28,159.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,388.80 : 72,548.88 = 18,781.68 : x
  2. Step 2: Convert to fraction form
    48,388.80/72,548.88 = 18,781.68/x
  3. Step 3: Cross multiply
    48,388.80x = 72,548.88 × 18,781.68
  4. Step 4: Simplify right side
    48,388.80x = 1,362,589,848.52
  5. Step 5: Solve for x
    x = 1,362,589,848.52/48,388.80
  6. Step 6: Final answer
    x = 28,159.20

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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.