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Finding the Fourth Proportional to 40,859.20, 61,256.40 and 22,391.20

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Solution

The fourth proportional to 40,859.20, 61,256.40 and 22,391.20 is: 33,569.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,859.20 : 61,256.40 = 22,391.20 : x
  2. Step 2: Convert to fraction form
    40,859.20/61,256.40 = 22,391.20/x
  3. Step 3: Cross multiply
    40,859.20x = 61,256.40 × 22,391.20
  4. Step 4: Simplify right side
    40,859.20x = 1,371,604,303.68
  5. Step 5: Solve for x
    x = 1,371,604,303.68/40,859.20
  6. Step 6: Final answer
    x = 33,569.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.