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Finding the Fourth Proportional to 88.80, 122.57 and 56.10

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Solution

The fourth proportional to 88.80, 122.57 and 56.10 is: 77.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.80 : 122.57 = 56.10 : x
  2. Step 2: Convert to fraction form
    88.80/122.57 = 56.10/x
  3. Step 3: Cross multiply
    88.80x = 122.57 × 56.10
  4. Step 4: Simplify right side
    88.80x = 6,876.11
  5. Step 5: Solve for x
    x = 6,876.11/88.80
  6. Step 6: Final answer
    x = 77.43

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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.