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Finding the Fourth Proportional to 74.01, 101.88 and 62.40

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Solution

The fourth proportional to 74.01, 101.88 and 62.40 is: 85.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.01 : 101.88 = 62.40 : x
  2. Step 2: Convert to fraction form
    74.01/101.88 = 62.40/x
  3. Step 3: Cross multiply
    74.01x = 101.88 × 62.40
  4. Step 4: Simplify right side
    74.01x = 6,357.31
  5. Step 5: Solve for x
    x = 6,357.31/74.01
  6. Step 6: Final answer
    x = 85.90

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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.