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Finding the Fourth Proportional to 99,555.90, 137,387.14 and 54,843.90

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Solution

The fourth proportional to 99,555.90, 137,387.14 and 54,843.90 is: 75,684.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,555.90 : 137,387.14 = 54,843.90 : x
  2. Step 2: Convert to fraction form
    99,555.90/137,387.14 = 54,843.90/x
  3. Step 3: Cross multiply
    99,555.90x = 137,387.14 × 54,843.90
  4. Step 4: Simplify right side
    99,555.90x = 7,534,846,567.45
  5. Step 5: Solve for x
    x = 7,534,846,567.45/99,555.90
  6. Step 6: Final answer
    x = 75,684.58

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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.