Home / 71,908.16-99,239.28-40,072.80

Finding the Fourth Proportional to 71,908.16, 99,239.28 and 40,072.80

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Solution

The fourth proportional to 71,908.16, 99,239.28 and 40,072.80 is: 55,303.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,908.16 : 99,239.28 = 40,072.80 : x
  2. Step 2: Convert to fraction form
    71,908.16/99,239.28 = 40,072.80/x
  3. Step 3: Cross multiply
    71,908.16x = 99,239.28 × 40,072.80
  4. Step 4: Simplify right side
    71,908.16x = 3,976,795,819.58
  5. Step 5: Solve for x
    x = 3,976,795,819.58/71,908.16
  6. Step 6: Final answer
    x = 55,303.82

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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.