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Finding the Fourth Proportional to 70,785.70, 106,215.30 and 66,701.48

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Solution

The fourth proportional to 70,785.70, 106,215.30 and 66,701.48 is: 100,086.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,785.70 : 106,215.30 = 66,701.48 : x
  2. Step 2: Convert to fraction form
    70,785.70/106,215.30 = 66,701.48/x
  3. Step 3: Cross multiply
    70,785.70x = 106,215.30 × 66,701.48
  4. Step 4: Simplify right side
    70,785.70x = 7,084,717,177.57
  5. Step 5: Solve for x
    x = 7,084,717,177.57/70,785.70
  6. Step 6: Final answer
    x = 100,086.85

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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.