Home / 80,654.40-121,031.28-51,031.44

Finding the Fourth Proportional to 80,654.40, 121,031.28 and 51,031.44

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Solution

The fourth proportional to 80,654.40, 121,031.28 and 51,031.44 is: 76,578.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,654.40 : 121,031.28 = 51,031.44 : x
  2. Step 2: Convert to fraction form
    80,654.40/121,031.28 = 51,031.44/x
  3. Step 3: Cross multiply
    80,654.40x = 121,031.28 × 51,031.44
  4. Step 4: Simplify right side
    80,654.40x = 6,176,400,503.44
  5. Step 5: Solve for x
    x = 6,176,400,503.44/80,654.40
  6. Step 6: Final answer
    x = 76,578.59

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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.