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Finding the Fourth Proportional to 113,987.76, 170,146.97 and 100,520.92

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Solution

The fourth proportional to 113,987.76, 170,146.97 and 100,520.92 is: 150,045.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,987.76 : 170,146.97 = 100,520.92 : x
  2. Step 2: Convert to fraction form
    113,987.76/170,146.97 = 100,520.92/x
  3. Step 3: Cross multiply
    113,987.76x = 170,146.97 × 100,520.92
  4. Step 4: Simplify right side
    113,987.76x = 17,103,330,046.65
  5. Step 5: Solve for x
    x = 17,103,330,046.65/113,987.76
  6. Step 6: Final answer
    x = 150,045.33

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1.5x scale

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.