Home / 91,407.78-137,110.23-66,605.22

Finding the Fourth Proportional to 91,407.78, 137,110.23 and 66,605.22

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Solution

The fourth proportional to 91,407.78, 137,110.23 and 66,605.22 is: 99,906.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,407.78 : 137,110.23 = 66,605.22 : x
  2. Step 2: Convert to fraction form
    91,407.78/137,110.23 = 66,605.22/x
  3. Step 3: Cross multiply
    91,407.78x = 137,110.23 × 66,605.22
  4. Step 4: Simplify right side
    91,407.78x = 9,132,257,033.40
  5. Step 5: Solve for x
    x = 9,132,257,033.40/91,407.78
  6. Step 6: Final answer
    x = 99,906.78

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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.