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Finding the Fourth Proportional to 99,862.47, 137,809.49 and 54,540.45

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Solution

The fourth proportional to 99,862.47, 137,809.49 and 54,540.45 is: 75,265.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,862.47 : 137,809.49 = 54,540.45 : x
  2. Step 2: Convert to fraction form
    99,862.47/137,809.49 = 54,540.45/x
  3. Step 3: Cross multiply
    99,862.47x = 137,809.49 × 54,540.45
  4. Step 4: Simplify right side
    99,862.47x = 7,516,191,598.87
  5. Step 5: Solve for x
    x = 7,516,191,598.87/99,862.47
  6. Step 6: Final answer
    x = 75,265.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.