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Finding the Fourth Proportional to 124.47, 186.72 and 56.05

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Solution

The fourth proportional to 124.47, 186.72 and 56.05 is: 84.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.47 : 186.72 = 56.05 : x
  2. Step 2: Convert to fraction form
    124.47/186.72 = 56.05/x
  3. Step 3: Cross multiply
    124.47x = 186.72 × 56.05
  4. Step 4: Simplify right side
    124.47x = 10,465.66
  5. Step 5: Solve for x
    x = 10,465.66/124.47
  6. Step 6: Final answer
    x = 84.08

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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.