Home / 99,988.45-137,982.59-54,666.61

Finding the Fourth Proportional to 99,988.45, 137,982.59 and 54,666.61

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Solution

The fourth proportional to 99,988.45, 137,982.59 and 54,666.61 is: 75,439.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,988.45 : 137,982.59 = 54,666.61 : x
  2. Step 2: Convert to fraction form
    99,988.45/137,982.59 = 54,666.61/x
  3. Step 3: Cross multiply
    99,988.45x = 137,982.59 × 54,666.61
  4. Step 4: Simplify right side
    99,988.45x = 7,543,040,021.03
  5. Step 5: Solve for x
    x = 7,543,040,021.03/99,988.45
  6. Step 6: Final answer
    x = 75,439.12

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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.