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Finding the Fourth Proportional to 61.02, 83.76 and 55.53

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Solution

The fourth proportional to 61.02, 83.76 and 55.53 is: 76.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.02 : 83.76 = 55.53 : x
  2. Step 2: Convert to fraction form
    61.02/83.76 = 55.53/x
  3. Step 3: Cross multiply
    61.02x = 83.76 × 55.53
  4. Step 4: Simplify right side
    61.02x = 4,651.19
  5. Step 5: Solve for x
    x = 4,651.19/61.02
  6. Step 6: Final answer
    x = 76.22

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.