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Finding the Fourth Proportional to 113,891.80, 170,837.70 and 100,769.80

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Solution

The fourth proportional to 113,891.80, 170,837.70 and 100,769.80 is: 151,154.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,891.80 : 170,837.70 = 100,769.80 : x
  2. Step 2: Convert to fraction form
    113,891.80/170,837.70 = 100,769.80/x
  3. Step 3: Cross multiply
    113,891.80x = 170,837.70 × 100,769.80
  4. Step 4: Simplify right side
    113,891.80x = 17,215,280,861.46
  5. Step 5: Solve for x
    x = 17,215,280,861.46/113,891.80
  6. Step 6: Final answer
    x = 151,154.70

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1.5x scale

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.