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Finding the Fourth Proportional to 101.52, 139.98 and 99.48

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Solution

The fourth proportional to 101.52, 139.98 and 99.48 is: 137.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.52 : 139.98 = 99.48 : x
  2. Step 2: Convert to fraction form
    101.52/139.98 = 99.48/x
  3. Step 3: Cross multiply
    101.52x = 139.98 × 99.48
  4. Step 4: Simplify right side
    101.52x = 13,925.21
  5. Step 5: Solve for x
    x = 13,925.21/101.52
  6. Step 6: Final answer
    x = 137.17

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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.