Home / 128,214.20-192,321.30-34,719.80

Finding the Fourth Proportional to 128,214.20, 192,321.30 and 34,719.80

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Solution

The fourth proportional to 128,214.20, 192,321.30 and 34,719.80 is: 52,079.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,214.20 : 192,321.30 = 34,719.80 : x
  2. Step 2: Convert to fraction form
    128,214.20/192,321.30 = 34,719.80/x
  3. Step 3: Cross multiply
    128,214.20x = 192,321.30 × 34,719.80
  4. Step 4: Simplify right side
    128,214.20x = 6,677,357,071.74
  5. Step 5: Solve for x
    x = 6,677,357,071.74/128,214.20
  6. Step 6: Final answer
    x = 52,079.70

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1.5x scale

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.