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Finding the Fourth Proportional to 99,554.90, 137,385.76 and 54,842.90

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Solution

The fourth proportional to 99,554.90, 137,385.76 and 54,842.90 is: 75,683.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,554.90 : 137,385.76 = 54,842.90 : x
  2. Step 2: Convert to fraction form
    99,554.90/137,385.76 = 54,842.90/x
  3. Step 3: Cross multiply
    99,554.90x = 137,385.76 × 54,842.90
  4. Step 4: Simplify right side
    99,554.90x = 7,534,633,497.10
  5. Step 5: Solve for x
    x = 7,534,633,497.10/99,554.90
  6. Step 6: Final answer
    x = 75,683.20

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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.