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Finding the Fourth Proportional to 74.47, 102.50 and 62.05

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Solution

The fourth proportional to 74.47, 102.50 and 62.05 is: 85.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.47 : 102.50 = 62.05 : x
  2. Step 2: Convert to fraction form
    74.47/102.50 = 62.05/x
  3. Step 3: Cross multiply
    74.47x = 102.50 × 62.05
  4. Step 4: Simplify right side
    74.47x = 6,360.13
  5. Step 5: Solve for x
    x = 6,360.13/74.47
  6. Step 6: Final answer
    x = 85.41

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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.