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Finding the Fourth Proportional to 61.04, 91.12 and 52.08

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Solution

The fourth proportional to 61.04, 91.12 and 52.08 is: 77.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.04 : 91.12 = 52.08 : x
  2. Step 2: Convert to fraction form
    61.04/91.12 = 52.08/x
  3. Step 3: Cross multiply
    61.04x = 91.12 × 52.08
  4. Step 4: Simplify right side
    61.04x = 4,745.53
  5. Step 5: Solve for x
    x = 4,745.53/61.04
  6. Step 6: Final answer
    x = 77.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.