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Finding the Fourth Proportional to 95.47, 130.98 and 90.88

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Solution

The fourth proportional to 95.47, 130.98 and 90.88 is: 124.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.47 : 130.98 = 90.88 : x
  2. Step 2: Convert to fraction form
    95.47/130.98 = 90.88/x
  3. Step 3: Cross multiply
    95.47x = 130.98 × 90.88
  4. Step 4: Simplify right side
    95.47x = 11,903.46
  5. Step 5: Solve for x
    x = 11,903.46/95.47
  6. Step 6: Final answer
    x = 124.68

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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.