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Finding the Fourth Proportional to 61.80, 92.10 and 60.43

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Solution

The fourth proportional to 61.80, 92.10 and 60.43 is: 90.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.80 : 92.10 = 60.43 : x
  2. Step 2: Convert to fraction form
    61.80/92.10 = 60.43/x
  3. Step 3: Cross multiply
    61.80x = 92.10 × 60.43
  4. Step 4: Simplify right side
    61.80x = 5,565.77
  5. Step 5: Solve for x
    x = 5,565.77/61.80
  6. Step 6: Final answer
    x = 90.07

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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.