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Finding the Fourth Proportional to 91.08, 125.66 and 56.13

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Solution

The fourth proportional to 91.08, 125.66 and 56.13 is: 77.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.08 : 125.66 = 56.13 : x
  2. Step 2: Convert to fraction form
    91.08/125.66 = 56.13/x
  3. Step 3: Cross multiply
    91.08x = 125.66 × 56.13
  4. Step 4: Simplify right side
    91.08x = 7,053.02
  5. Step 5: Solve for x
    x = 7,053.02/91.08
  6. Step 6: Final answer
    x = 77.44

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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.