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Finding the Fourth Proportional to 80,740, 121,129.58 and 25,336

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Solution

The fourth proportional to 80,740, 121,129.58 and 25,336 is: 38,010.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,740 : 121,129.58 = 25,336 : x
  2. Step 2: Convert to fraction form
    80,740/121,129.58 = 25,336/x
  3. Step 3: Cross multiply
    80,740x = 121,129.58 × 25,336
  4. Step 4: Simplify right side
    80,740x = 3,068,939,038.88
  5. Step 5: Solve for x
    x = 3,068,939,038.88/80,740
  6. Step 6: Final answer
    x = 38,010.14

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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.