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Finding the Fourth Proportional to 101.47, 151.49 and 87.03

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Solution

The fourth proportional to 101.47, 151.49 and 87.03 is: 129.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.47 : 151.49 = 87.03 : x
  2. Step 2: Convert to fraction form
    101.47/151.49 = 87.03/x
  3. Step 3: Cross multiply
    101.47x = 151.49 × 87.03
  4. Step 4: Simplify right side
    101.47x = 13,184.17
  5. Step 5: Solve for x
    x = 13,184.17/101.47
  6. Step 6: Final answer
    x = 129.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.