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Finding the Fourth Proportional to 42,221.48, 58,256.70 and 25,221.20

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Solution

The fourth proportional to 42,221.48, 58,256.70 and 25,221.20 is: 34,799.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,221.48 : 58,256.70 = 25,221.20 : x
  2. Step 2: Convert to fraction form
    42,221.48/58,256.70 = 25,221.20/x
  3. Step 3: Cross multiply
    42,221.48x = 58,256.70 × 25,221.20
  4. Step 4: Simplify right side
    42,221.48x = 1,469,303,882.04
  5. Step 5: Solve for x
    x = 1,469,303,882.04/42,221.48
  6. Step 6: Final answer
    x = 34,799.91

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.