Home / 72,189.88-99,625.14-40,358.80

Finding the Fourth Proportional to 72,189.88, 99,625.14 and 40,358.80

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Solution

The fourth proportional to 72,189.88, 99,625.14 and 40,358.80 is: 55,696.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,189.88 : 99,625.14 = 40,358.80 : x
  2. Step 2: Convert to fraction form
    72,189.88/99,625.14 = 40,358.80/x
  3. Step 3: Cross multiply
    72,189.88x = 99,625.14 × 40,358.80
  4. Step 4: Simplify right side
    72,189.88x = 4,020,751,100.23
  5. Step 5: Solve for x
    x = 4,020,751,100.23/72,189.88
  6. Step 6: Final answer
    x = 55,696.88

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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.