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Finding the Fourth Proportional to 98.75, 147.02 and 94.32

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Solution

The fourth proportional to 98.75, 147.02 and 94.32 is: 140.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.75 : 147.02 = 94.32 : x
  2. Step 2: Convert to fraction form
    98.75/147.02 = 94.32/x
  3. Step 3: Cross multiply
    98.75x = 147.02 × 94.32
  4. Step 4: Simplify right side
    98.75x = 13,866.45
  5. Step 5: Solve for x
    x = 13,866.45/98.75
  6. Step 6: Final answer
    x = 140.42

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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.