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Finding the Fourth Proportional to 99,493.90, 137,257.21 and 67,218.14

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Solution

The fourth proportional to 99,493.90, 137,257.21 and 67,218.14 is: 92,731.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,493.90 : 137,257.21 = 67,218.14 : x
  2. Step 2: Convert to fraction form
    99,493.90/137,257.21 = 67,218.14/x
  3. Step 3: Cross multiply
    99,493.90x = 137,257.21 × 67,218.14
  4. Step 4: Simplify right side
    99,493.90x = 9,226,174,357.79
  5. Step 5: Solve for x
    x = 9,226,174,357.79/99,493.90
  6. Step 6: Final answer
    x = 92,731.06

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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.