Home / 91,824.70-137,542.65-81,975.10

Finding the Fourth Proportional to 91,824.70, 137,542.65 and 81,975.10

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Solution

The fourth proportional to 91,824.70, 137,542.65 and 81,975.10 is: 122,789.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,824.70 : 137,542.65 = 81,975.10 : x
  2. Step 2: Convert to fraction form
    91,824.70/137,542.65 = 81,975.10/x
  3. Step 3: Cross multiply
    91,824.70x = 137,542.65 × 81,975.10
  4. Step 4: Simplify right side
    91,824.70x = 11,275,072,488.02
  5. Step 5: Solve for x
    x = 11,275,072,488.02/91,824.70
  6. Step 6: Final answer
    x = 122,789.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.