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Finding the Fourth Proportional to 91.63, 126.53 and 62.65

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Solution

The fourth proportional to 91.63, 126.53 and 62.65 is: 86.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.63 : 126.53 = 62.65 : x
  2. Step 2: Convert to fraction form
    91.63/126.53 = 62.65/x
  3. Step 3: Cross multiply
    91.63x = 126.53 × 62.65
  4. Step 4: Simplify right side
    91.63x = 7,927.10
  5. Step 5: Solve for x
    x = 7,927.10/91.63
  6. Step 6: Final answer
    x = 86.51

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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.