Home / 121,498.20-182,247.30-77,320.80

Finding the Fourth Proportional to 121,498.20, 182,247.30 and 77,320.80

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Solution

The fourth proportional to 121,498.20, 182,247.30 and 77,320.80 is: 115,981.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,498.20 : 182,247.30 = 77,320.80 : x
  2. Step 2: Convert to fraction form
    121,498.20/182,247.30 = 77,320.80/x
  3. Step 3: Cross multiply
    121,498.20x = 182,247.30 × 77,320.80
  4. Step 4: Simplify right side
    121,498.20x = 14,091,507,033.84
  5. Step 5: Solve for x
    x = 14,091,507,033.84/121,498.20
  6. Step 6: Final answer
    x = 115,981.20

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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.