Home / 91,001.40-136,502.10-81,324.60

Finding the Fourth Proportional to 91,001.40, 136,502.10 and 81,324.60

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Solution

The fourth proportional to 91,001.40, 136,502.10 and 81,324.60 is: 121,986.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,001.40 : 136,502.10 = 81,324.60 : x
  2. Step 2: Convert to fraction form
    91,001.40/136,502.10 = 81,324.60/x
  3. Step 3: Cross multiply
    91,001.40x = 136,502.10 × 81,324.60
  4. Step 4: Simplify right side
    91,001.40x = 11,100,978,681.66
  5. Step 5: Solve for x
    x = 11,100,978,681.66/91,001.40
  6. Step 6: Final answer
    x = 121,986.90

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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.