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Finding the Fourth Proportional to 81,006.85, 121,510.28 and 73,133.65

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Solution

The fourth proportional to 81,006.85, 121,510.28 and 73,133.65 is: 109,700.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,006.85 : 121,510.28 = 73,133.65 : x
  2. Step 2: Convert to fraction form
    81,006.85/121,510.28 = 73,133.65/x
  3. Step 3: Cross multiply
    81,006.85x = 121,510.28 × 73,133.65
  4. Step 4: Simplify right side
    81,006.85x = 8,886,489,923.25
  5. Step 5: Solve for x
    x = 8,886,489,923.25/81,006.85
  6. Step 6: Final answer
    x = 109,700.48

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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.