Home / 80,782.40-121,159.20-51,147.20

Finding the Fourth Proportional to 80,782.40, 121,159.20 and 51,147.20

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Solution

The fourth proportional to 80,782.40, 121,159.20 and 51,147.20 is: 76,711.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,782.40 : 121,159.20 = 51,147.20 : x
  2. Step 2: Convert to fraction form
    80,782.40/121,159.20 = 51,147.20/x
  3. Step 3: Cross multiply
    80,782.40x = 121,159.20 × 51,147.20
  4. Step 4: Simplify right side
    80,782.40x = 6,196,953,834.24
  5. Step 5: Solve for x
    x = 6,196,953,834.24/80,782.40
  6. Step 6: Final answer
    x = 76,711.68

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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.