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Finding the Fourth Proportional to 71,943.80, 99,277.78 and 40,110.80

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Solution

The fourth proportional to 71,943.80, 99,277.78 and 40,110.80 is: 55,350.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,943.80 : 99,277.78 = 40,110.80 : x
  2. Step 2: Convert to fraction form
    71,943.80/99,277.78 = 40,110.80/x
  3. Step 3: Cross multiply
    71,943.80x = 99,277.78 × 40,110.80
  4. Step 4: Simplify right side
    71,943.80x = 3,982,111,178.02
  5. Step 5: Solve for x
    x = 3,982,111,178.02/71,943.80
  6. Step 6: Final answer
    x = 55,350.30

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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.