Home / 72,121.97-99,528.38-40,291.61

Finding the Fourth Proportional to 72,121.97, 99,528.38 and 40,291.61

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Solution

The fourth proportional to 72,121.97, 99,528.38 and 40,291.61 is: 55,602.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,121.97 : 99,528.38 = 40,291.61 : x
  2. Step 2: Convert to fraction form
    72,121.97/99,528.38 = 40,291.61/x
  3. Step 3: Cross multiply
    72,121.97x = 99,528.38 × 40,291.61
  4. Step 4: Simplify right side
    72,121.97x = 4,010,157,971.79
  5. Step 5: Solve for x
    x = 4,010,157,971.79/72,121.97
  6. Step 6: Final answer
    x = 55,602.45

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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.