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Finding the Fourth Proportional to 72,034.62, 99,409.35 and 39,769.12

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Solution

The fourth proportional to 72,034.62, 99,409.35 and 39,769.12 is: 54,882.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,034.62 : 99,409.35 = 39,769.12 : x
  2. Step 2: Convert to fraction form
    72,034.62/99,409.35 = 39,769.12/x
  3. Step 3: Cross multiply
    72,034.62x = 99,409.35 × 39,769.12
  4. Step 4: Simplify right side
    72,034.62x = 3,953,422,369.27
  5. Step 5: Solve for x
    x = 3,953,422,369.27/72,034.62
  6. Step 6: Final answer
    x = 54,882.25

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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.