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Finding the Fourth Proportional to 80,810.40, 121,235.04 and 25,406.40

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Solution

The fourth proportional to 80,810.40, 121,235.04 and 25,406.40 is: 38,115.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,810.40 : 121,235.04 = 25,406.40 : x
  2. Step 2: Convert to fraction form
    80,810.40/121,235.04 = 25,406.40/x
  3. Step 3: Cross multiply
    80,810.40x = 121,235.04 × 25,406.40
  4. Step 4: Simplify right side
    80,810.40x = 3,080,145,920.26
  5. Step 5: Solve for x
    x = 3,080,145,920.26/80,810.40
  6. Step 6: Final answer
    x = 38,115.71

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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.