Home / 80,914.30-121,306.65-34,128.70

Finding the Fourth Proportional to 80,914.30, 121,306.65 and 34,128.70

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Solution

The fourth proportional to 80,914.30, 121,306.65 and 34,128.70 is: 51,165.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,914.30 : 121,306.65 = 34,128.70 : x
  2. Step 2: Convert to fraction form
    80,914.30/121,306.65 = 34,128.70/x
  3. Step 3: Cross multiply
    80,914.30x = 121,306.65 × 34,128.70
  4. Step 4: Simplify right side
    80,914.30x = 4,140,038,265.86
  5. Step 5: Solve for x
    x = 4,140,038,265.86/80,914.30
  6. Step 6: Final answer
    x = 51,165.72

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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.