Home / 91,427.10-137,140.65-76,992.90

Finding the Fourth Proportional to 91,427.10, 137,140.65 and 76,992.90

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Solution

The fourth proportional to 91,427.10, 137,140.65 and 76,992.90 is: 115,489.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,427.10 : 137,140.65 = 76,992.90 : x
  2. Step 2: Convert to fraction form
    91,427.10/137,140.65 = 76,992.90/x
  3. Step 3: Cross multiply
    91,427.10x = 137,140.65 × 76,992.90
  4. Step 4: Simplify right side
    91,427.10x = 10,558,856,351.39
  5. Step 5: Solve for x
    x = 10,558,856,351.39/91,427.10
  6. Step 6: Final answer
    x = 115,489.35

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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.