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Finding the Fourth Proportional to 101.19, 139.67 and 57.53

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Solution

The fourth proportional to 101.19, 139.67 and 57.53 is: 79.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.19 : 139.67 = 57.53 : x
  2. Step 2: Convert to fraction form
    101.19/139.67 = 57.53/x
  3. Step 3: Cross multiply
    101.19x = 139.67 × 57.53
  4. Step 4: Simplify right side
    101.19x = 8,034.93
  5. Step 5: Solve for x
    x = 8,034.93/101.19
  6. Step 6: Final answer
    x = 79.40

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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.