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Finding the Fourth Proportional to 61.80, 93.36 and 61.56

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Solution

The fourth proportional to 61.80, 93.36 and 61.56 is: 93.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.80 : 93.36 = 61.56 : x
  2. Step 2: Convert to fraction form
    61.80/93.36 = 61.56/x
  3. Step 3: Cross multiply
    61.80x = 93.36 × 61.56
  4. Step 4: Simplify right side
    61.80x = 5,747.24
  5. Step 5: Solve for x
    x = 5,747.24/61.80
  6. Step 6: Final answer
    x = 93.00

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.