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Finding the Fourth Proportional to 99.56, 137.36 and 62.66

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Solution

The fourth proportional to 99.56, 137.36 and 62.66 is: 86.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.56 : 137.36 = 62.66 : x
  2. Step 2: Convert to fraction form
    99.56/137.36 = 62.66/x
  3. Step 3: Cross multiply
    99.56x = 137.36 × 62.66
  4. Step 4: Simplify right side
    99.56x = 8,606.98
  5. Step 5: Solve for x
    x = 8,606.98/99.56
  6. Step 6: Final answer
    x = 86.45

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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.