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Finding the Fourth Proportional to 177.61, 245.08 and 99.99

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Solution

The fourth proportional to 177.61, 245.08 and 99.99 is: 137.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.61 : 245.08 = 99.99 : x
  2. Step 2: Convert to fraction form
    177.61/245.08 = 99.99/x
  3. Step 3: Cross multiply
    177.61x = 245.08 × 99.99
  4. Step 4: Simplify right side
    177.61x = 24,505.55
  5. Step 5: Solve for x
    x = 24,505.55/177.61
  6. Step 6: Final answer
    x = 137.97

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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.