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Finding the Fourth Proportional to 43,259.60, 64,759.80 and 25,720.40

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Solution

The fourth proportional to 43,259.60, 64,759.80 and 25,720.40 is: 38,503.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,259.60 : 64,759.80 = 25,720.40 : x
  2. Step 2: Convert to fraction form
    43,259.60/64,759.80 = 25,720.40/x
  3. Step 3: Cross multiply
    43,259.60x = 64,759.80 × 25,720.40
  4. Step 4: Simplify right side
    43,259.60x = 1,665,647,959.92
  5. Step 5: Solve for x
    x = 1,665,647,959.92/43,259.60
  6. Step 6: Final answer
    x = 38,503.55

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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.