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Finding the Fourth Proportional to 98.26, 147.40 and 46.91

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Solution

The fourth proportional to 98.26, 147.40 and 46.91 is: 70.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.26 : 147.40 = 46.91 : x
  2. Step 2: Convert to fraction form
    98.26/147.40 = 46.91/x
  3. Step 3: Cross multiply
    98.26x = 147.40 × 46.91
  4. Step 4: Simplify right side
    98.26x = 6,913.80
  5. Step 5: Solve for x
    x = 6,913.80/98.26
  6. Step 6: Final answer
    x = 70.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.