Home / 99,971.17-137,960.49-54,649.70

Finding the Fourth Proportional to 99,971.17, 137,960.49 and 54,649.70

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Solution

The fourth proportional to 99,971.17, 137,960.49 and 54,649.70 is: 75,416.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,971.17 : 137,960.49 = 54,649.70 : x
  2. Step 2: Convert to fraction form
    99,971.17/137,960.49 = 54,649.70/x
  3. Step 3: Cross multiply
    99,971.17x = 137,960.49 × 54,649.70
  4. Step 4: Simplify right side
    99,971.17x = 7,539,498,700.55
  5. Step 5: Solve for x
    x = 7,539,498,700.55/99,971.17
  6. Step 6: Final answer
    x = 75,416.73

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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.