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Finding the Fourth Proportional to 72,956.32, 100,717.79 and 51,786.16

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Solution

The fourth proportional to 72,956.32, 100,717.79 and 51,786.16 is: 71,491.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,956.32 : 100,717.79 = 51,786.16 : x
  2. Step 2: Convert to fraction form
    72,956.32/100,717.79 = 51,786.16/x
  3. Step 3: Cross multiply
    72,956.32x = 100,717.79 × 51,786.16
  4. Step 4: Simplify right side
    72,956.32x = 5,215,787,077.06
  5. Step 5: Solve for x
    x = 5,215,787,077.06/72,956.32
  6. Step 6: Final answer
    x = 71,491.92

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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.