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Finding the Fourth Proportional to 74,471.80, 111,707.70 and 68,769.40

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Solution

The fourth proportional to 74,471.80, 111,707.70 and 68,769.40 is: 103,154.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,471.80 : 111,707.70 = 68,769.40 : x
  2. Step 2: Convert to fraction form
    74,471.80/111,707.70 = 68,769.40/x
  3. Step 3: Cross multiply
    74,471.80x = 111,707.70 × 68,769.40
  4. Step 4: Simplify right side
    74,471.80x = 7,682,071,504.38
  5. Step 5: Solve for x
    x = 7,682,071,504.38/74,471.80
  6. Step 6: Final answer
    x = 103,154.10

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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.