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Finding the Fourth Proportional to 80,941.60, 121,282.80 and 53,207.20

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Solution

The fourth proportional to 80,941.60, 121,282.80 and 53,207.20 is: 79,725.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,941.60 : 121,282.80 = 53,207.20 : x
  2. Step 2: Convert to fraction form
    80,941.60/121,282.80 = 53,207.20/x
  3. Step 3: Cross multiply
    80,941.60x = 121,282.80 × 53,207.20
  4. Step 4: Simplify right side
    80,941.60x = 6,453,118,196.16
  5. Step 5: Solve for x
    x = 6,453,118,196.16/80,941.60
  6. Step 6: Final answer
    x = 79,725.61

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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.