Home / 72,041.09-99,422.57-39,778.65

Finding the Fourth Proportional to 72,041.09, 99,422.57 and 39,778.65

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Solution

The fourth proportional to 72,041.09, 99,422.57 and 39,778.65 is: 54,897.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,041.09 : 99,422.57 = 39,778.65 : x
  2. Step 2: Convert to fraction form
    72,041.09/99,422.57 = 39,778.65/x
  3. Step 3: Cross multiply
    72,041.09x = 99,422.57 × 39,778.65
  4. Step 4: Simplify right side
    72,041.09x = 3,954,895,713.58
  5. Step 5: Solve for x
    x = 3,954,895,713.58/72,041.09
  6. Step 6: Final answer
    x = 54,897.78

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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.