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Finding the Fourth Proportional to 88.76, 122.45 and 53.77

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Solution

The fourth proportional to 88.76, 122.45 and 53.77 is: 74.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.76 : 122.45 = 53.77 : x
  2. Step 2: Convert to fraction form
    88.76/122.45 = 53.77/x
  3. Step 3: Cross multiply
    88.76x = 122.45 × 53.77
  4. Step 4: Simplify right side
    88.76x = 6,584.14
  5. Step 5: Solve for x
    x = 6,584.14/88.76
  6. Step 6: Final answer
    x = 74.18

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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.