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Finding the Fourth Proportional to 98,648.70, 148,033.80 and 42,515.70

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Solution

The fourth proportional to 98,648.70, 148,033.80 and 42,515.70 is: 63,799.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,648.70 : 148,033.80 = 42,515.70 : x
  2. Step 2: Convert to fraction form
    98,648.70/148,033.80 = 42,515.70/x
  3. Step 3: Cross multiply
    98,648.70x = 148,033.80 × 42,515.70
  4. Step 4: Simplify right side
    98,648.70x = 6,293,760,630.66
  5. Step 5: Solve for x
    x = 6,293,760,630.66/98,648.70
  6. Step 6: Final answer
    x = 63,799.73

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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.