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Finding the Fourth Proportional to 70,754.28, 97,640.16 and 38,923.20

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Solution

The fourth proportional to 70,754.28, 97,640.16 and 38,923.20 is: 53,713.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,754.28 : 97,640.16 = 38,923.20 : x
  2. Step 2: Convert to fraction form
    70,754.28/97,640.16 = 38,923.20/x
  3. Step 3: Cross multiply
    70,754.28x = 97,640.16 × 38,923.20
  4. Step 4: Simplify right side
    70,754.28x = 3,800,467,475.71
  5. Step 5: Solve for x
    x = 3,800,467,475.71/70,754.28
  6. Step 6: Final answer
    x = 53,713.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.