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Finding the Fourth Proportional to 94.49, 130.03 and 87.60

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Solution

The fourth proportional to 94.49, 130.03 and 87.60 is: 120.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.49 : 130.03 = 87.60 : x
  2. Step 2: Convert to fraction form
    94.49/130.03 = 87.60/x
  3. Step 3: Cross multiply
    94.49x = 130.03 × 87.60
  4. Step 4: Simplify right side
    94.49x = 11,390.63
  5. Step 5: Solve for x
    x = 11,390.63/94.49
  6. Step 6: Final answer
    x = 120.55

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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.