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Finding the Fourth Proportional to 91,466.40, 137,491.20 and 86,217.60

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Solution

The fourth proportional to 91,466.40, 137,491.20 and 86,217.60 is: 129,601.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,466.40 : 137,491.20 = 86,217.60 : x
  2. Step 2: Convert to fraction form
    91,466.40/137,491.20 = 86,217.60/x
  3. Step 3: Cross multiply
    91,466.40x = 137,491.20 × 86,217.60
  4. Step 4: Simplify right side
    91,466.40x = 11,854,161,285.12
  5. Step 5: Solve for x
    x = 11,854,161,285.12/91,466.40
  6. Step 6: Final answer
    x = 129,601.27

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1.5x scale

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.