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Finding the Fourth Proportional to 54,342.40, 81,440.70 and 38,741.80

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Solution

The fourth proportional to 54,342.40, 81,440.70 and 38,741.80 is: 58,060.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,342.40 : 81,440.70 = 38,741.80 : x
  2. Step 2: Convert to fraction form
    54,342.40/81,440.70 = 38,741.80/x
  3. Step 3: Cross multiply
    54,342.40x = 81,440.70 × 38,741.80
  4. Step 4: Simplify right side
    54,342.40x = 3,155,159,311.26
  5. Step 5: Solve for x
    x = 3,155,159,311.26/54,342.40
  6. Step 6: Final answer
    x = 58,060.73

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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.