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Finding the Fourth Proportional to 124.56, 186.56 and 88.40

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Solution

The fourth proportional to 124.56, 186.56 and 88.40 is: 132.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.56 : 186.56 = 88.40 : x
  2. Step 2: Convert to fraction form
    124.56/186.56 = 88.40/x
  3. Step 3: Cross multiply
    124.56x = 186.56 × 88.40
  4. Step 4: Simplify right side
    124.56x = 16,491.90
  5. Step 5: Solve for x
    x = 16,491.90/124.56
  6. Step 6: Final answer
    x = 132.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.