Home / 71,981.09-99,336.03-40,149.30

Finding the Fourth Proportional to 71,981.09, 99,336.03 and 40,149.30

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Solution

The fourth proportional to 71,981.09, 99,336.03 and 40,149.30 is: 55,407.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,981.09 : 99,336.03 = 40,149.30 : x
  2. Step 2: Convert to fraction form
    71,981.09/99,336.03 = 40,149.30/x
  3. Step 3: Cross multiply
    71,981.09x = 99,336.03 × 40,149.30
  4. Step 4: Simplify right side
    71,981.09x = 3,988,272,069.28
  5. Step 5: Solve for x
    x = 3,988,272,069.28/71,981.09
  6. Step 6: Final answer
    x = 55,407.22

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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.