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Finding the Fourth Proportional to 175.61, 242.30 and 100.89

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Solution

The fourth proportional to 175.61, 242.30 and 100.89 is: 139.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    175.61 : 242.30 = 100.89 : x
  2. Step 2: Convert to fraction form
    175.61/242.30 = 100.89/x
  3. Step 3: Cross multiply
    175.61x = 242.30 × 100.89
  4. Step 4: Simplify right side
    175.61x = 24,445.14
  5. Step 5: Solve for x
    x = 24,445.14/175.61
  6. Step 6: Final answer
    x = 139.21

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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.