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Finding the Fourth Proportional to 73,239.60, 109,686.60 and 49,738.80

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Solution

The fourth proportional to 73,239.60, 109,686.60 and 49,738.80 is: 74,490.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,239.60 : 109,686.60 = 49,738.80 : x
  2. Step 2: Convert to fraction form
    73,239.60/109,686.60 = 49,738.80/x
  3. Step 3: Cross multiply
    73,239.60x = 109,686.60 × 49,738.80
  4. Step 4: Simplify right side
    73,239.60x = 5,455,679,860.08
  5. Step 5: Solve for x
    x = 5,455,679,860.08/73,239.60
  6. Step 6: Final answer
    x = 74,490.85

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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.