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Finding the Fourth Proportional to 62.40, 93.48 and 53.88

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Solution

The fourth proportional to 62.40, 93.48 and 53.88 is: 80.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.40 : 93.48 = 53.88 : x
  2. Step 2: Convert to fraction form
    62.40/93.48 = 53.88/x
  3. Step 3: Cross multiply
    62.40x = 93.48 × 53.88
  4. Step 4: Simplify right side
    62.40x = 5,036.70
  5. Step 5: Solve for x
    x = 5,036.70/62.40
  6. Step 6: Final answer
    x = 80.72

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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.