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Finding the Fourth Proportional to 54,316.40, 81,377.40 and 45,957.20

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Solution

The fourth proportional to 54,316.40, 81,377.40 and 45,957.20 is: 68,853.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,316.40 : 81,377.40 = 45,957.20 : x
  2. Step 2: Convert to fraction form
    54,316.40/81,377.40 = 45,957.20/x
  3. Step 3: Cross multiply
    54,316.40x = 81,377.40 × 45,957.20
  4. Step 4: Simplify right side
    54,316.40x = 3,739,877,447.28
  5. Step 5: Solve for x
    x = 3,739,877,447.28/54,316.40
  6. Step 6: Final answer
    x = 68,853.56

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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.