Home / 91,451.60-137,177.40-81,537.20

Finding the Fourth Proportional to 91,451.60, 137,177.40 and 81,537.20

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Solution

The fourth proportional to 91,451.60, 137,177.40 and 81,537.20 is: 122,305.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,451.60 : 137,177.40 = 81,537.20 : x
  2. Step 2: Convert to fraction form
    91,451.60/137,177.40 = 81,537.20/x
  3. Step 3: Cross multiply
    91,451.60x = 137,177.40 × 81,537.20
  4. Step 4: Simplify right side
    91,451.60x = 11,185,061,099.28
  5. Step 5: Solve for x
    x = 11,185,061,099.28/91,451.60
  6. Step 6: Final answer
    x = 122,305.80

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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.