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Finding the Fourth Proportional to 84,428.64, 126,648.96 and 25,259.52

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Solution

The fourth proportional to 84,428.64, 126,648.96 and 25,259.52 is: 37,891.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,428.64 : 126,648.96 = 25,259.52 : x
  2. Step 2: Convert to fraction form
    84,428.64/126,648.96 = 25,259.52/x
  3. Step 3: Cross multiply
    84,428.64x = 126,648.96 × 25,259.52
  4. Step 4: Simplify right side
    84,428.64x = 3,199,091,938.10
  5. Step 5: Solve for x
    x = 3,199,091,938.10/84,428.64
  6. Step 6: Final answer
    x = 37,891.08

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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.