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Finding the Fourth Proportional to 101,942.10, 152,913.15 and 66,512.70

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Solution

The fourth proportional to 101,942.10, 152,913.15 and 66,512.70 is: 99,769.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,942.10 : 152,913.15 = 66,512.70 : x
  2. Step 2: Convert to fraction form
    101,942.10/152,913.15 = 66,512.70/x
  3. Step 3: Cross multiply
    101,942.10x = 152,913.15 × 66,512.70
  4. Step 4: Simplify right side
    101,942.10x = 10,170,666,472.01
  5. Step 5: Solve for x
    x = 10,170,666,472.01/101,942.10
  6. Step 6: Final answer
    x = 99,769.05

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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.