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Finding the Fourth Proportional to 124.85, 171.59 and 101.50

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Solution

The fourth proportional to 124.85, 171.59 and 101.50 is: 139.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.85 : 171.59 = 101.50 : x
  2. Step 2: Convert to fraction form
    124.85/171.59 = 101.50/x
  3. Step 3: Cross multiply
    124.85x = 171.59 × 101.50
  4. Step 4: Simplify right side
    124.85x = 17,415.45
  5. Step 5: Solve for x
    x = 17,415.45/124.85
  6. Step 6: Final answer
    x = 139.49

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.