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Finding the Fourth Proportional to 124.76, 186.81 and 70.59

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Solution

The fourth proportional to 124.76, 186.81 and 70.59 is: 105.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.76 : 186.81 = 70.59 : x
  2. Step 2: Convert to fraction form
    124.76/186.81 = 70.59/x
  3. Step 3: Cross multiply
    124.76x = 186.81 × 70.59
  4. Step 4: Simplify right side
    124.76x = 13,186.30
  5. Step 5: Solve for x
    x = 13,186.30/124.76
  6. Step 6: Final answer
    x = 105.70

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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.