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Finding the Fourth Proportional to 112,501.80, 168,752.70 and 68,105.70

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Solution

The fourth proportional to 112,501.80, 168,752.70 and 68,105.70 is: 102,158.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,501.80 : 168,752.70 = 68,105.70 : x
  2. Step 2: Convert to fraction form
    112,501.80/168,752.70 = 68,105.70/x
  3. Step 3: Cross multiply
    112,501.80x = 168,752.70 × 68,105.70
  4. Step 4: Simplify right side
    112,501.80x = 11,493,020,760.39
  5. Step 5: Solve for x
    x = 11,493,020,760.39/112,501.80
  6. Step 6: Final answer
    x = 102,158.55

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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.