Home / 91,136.30-136,645.05-81,805.10

Finding the Fourth Proportional to 91,136.30, 136,645.05 and 81,805.10

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Solution

The fourth proportional to 91,136.30, 136,645.05 and 81,805.10 is: 122,654.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,136.30 : 136,645.05 = 81,805.10 : x
  2. Step 2: Convert to fraction form
    91,136.30/136,645.05 = 81,805.10/x
  3. Step 3: Cross multiply
    91,136.30x = 136,645.05 × 81,805.10
  4. Step 4: Simplify right side
    91,136.30x = 11,178,261,979.76
  5. Step 5: Solve for x
    x = 11,178,261,979.76/91,136.30
  6. Step 6: Final answer
    x = 122,654.33

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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.