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Finding the Fourth Proportional to 98.00, 146.13 and 87.74

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Solution

The fourth proportional to 98.00, 146.13 and 87.74 is: 130.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.00 : 146.13 = 87.74 : x
  2. Step 2: Convert to fraction form
    98.00/146.13 = 87.74/x
  3. Step 3: Cross multiply
    98.00x = 146.13 × 87.74
  4. Step 4: Simplify right side
    98.00x = 12,821.81
  5. Step 5: Solve for x
    x = 12,821.81/98.00
  6. Step 6: Final answer
    x = 130.83

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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.