Home / 99,945.18-137,920.28-54,624.66

Finding the Fourth Proportional to 99,945.18, 137,920.28 and 54,624.66

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Solution

The fourth proportional to 99,945.18, 137,920.28 and 54,624.66 is: 75,379.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,945.18 : 137,920.28 = 54,624.66 : x
  2. Step 2: Convert to fraction form
    99,945.18/137,920.28 = 54,624.66/x
  3. Step 3: Cross multiply
    99,945.18x = 137,920.28 × 54,624.66
  4. Step 4: Simplify right side
    99,945.18x = 7,533,848,402.10
  5. Step 5: Solve for x
    x = 7,533,848,402.10/99,945.18
  6. Step 6: Final answer
    x = 75,379.81

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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.