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Finding the Fourth Proportional to 91.01, 125.53 and 64.73

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Solution

The fourth proportional to 91.01, 125.53 and 64.73 is: 89.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.01 : 125.53 = 64.73 : x
  2. Step 2: Convert to fraction form
    91.01/125.53 = 64.73/x
  3. Step 3: Cross multiply
    91.01x = 125.53 × 64.73
  4. Step 4: Simplify right side
    91.01x = 8,125.71
  5. Step 5: Solve for x
    x = 8,125.71/91.01
  6. Step 6: Final answer
    x = 89.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.