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Finding the Fourth Proportional to 99,943.44, 137,920.32 and 54,620.88

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Solution

The fourth proportional to 99,943.44, 137,920.32 and 54,620.88 is: 75,375.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,943.44 : 137,920.32 = 54,620.88 : x
  2. Step 2: Convert to fraction form
    99,943.44/137,920.32 = 54,620.88/x
  3. Step 3: Cross multiply
    99,943.44x = 137,920.32 × 54,620.88
  4. Step 4: Simplify right side
    99,943.44x = 7,533,329,248.28
  5. Step 5: Solve for x
    x = 7,533,329,248.28/99,943.44
  6. Step 6: Final answer
    x = 75,375.93

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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.