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Finding the Fourth Proportional to 98.71, 147.06 and 98.10

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Solution

The fourth proportional to 98.71, 147.06 and 98.10 is: 146.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.71 : 147.06 = 98.10 : x
  2. Step 2: Convert to fraction form
    98.71/147.06 = 98.10/x
  3. Step 3: Cross multiply
    98.71x = 147.06 × 98.10
  4. Step 4: Simplify right side
    98.71x = 14,426.59
  5. Step 5: Solve for x
    x = 14,426.59/98.71
  6. Step 6: Final answer
    x = 146.15

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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.