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Finding the Fourth Proportional to 62.61, 93.78 and 61.35

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Solution

The fourth proportional to 62.61, 93.78 and 61.35 is: 91.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.61 : 93.78 = 61.35 : x
  2. Step 2: Convert to fraction form
    62.61/93.78 = 61.35/x
  3. Step 3: Cross multiply
    62.61x = 93.78 × 61.35
  4. Step 4: Simplify right side
    62.61x = 5,753.40
  5. Step 5: Solve for x
    x = 5,753.40/62.61
  6. Step 6: Final answer
    x = 91.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.