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Finding the Fourth Proportional to 91.57, 126.19 and 70.76

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Solution

The fourth proportional to 91.57, 126.19 and 70.76 is: 97.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.57 : 126.19 = 70.76 : x
  2. Step 2: Convert to fraction form
    91.57/126.19 = 70.76/x
  3. Step 3: Cross multiply
    91.57x = 126.19 × 70.76
  4. Step 4: Simplify right side
    91.57x = 8,929.20
  5. Step 5: Solve for x
    x = 8,929.20/91.57
  6. Step 6: Final answer
    x = 97.51

Related Problems

Find fourth proportional to 45.79, 63.10 and 35.38
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Double scale
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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.