Home / 91,456.40-137,476.20-86,207.60

Finding the Fourth Proportional to 91,456.40, 137,476.20 and 86,207.60

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Solution

The fourth proportional to 91,456.40, 137,476.20 and 86,207.60 is: 129,586.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,456.40 : 137,476.20 = 86,207.60 : x
  2. Step 2: Convert to fraction form
    91,456.40/137,476.20 = 86,207.60/x
  3. Step 3: Cross multiply
    91,456.40x = 137,476.20 × 86,207.60
  4. Step 4: Simplify right side
    91,456.40x = 11,851,493,259.12
  5. Step 5: Solve for x
    x = 11,851,493,259.12/91,456.40
  6. Step 6: Final answer
    x = 129,586.26

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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.