Home / 127,920.20-191,621.10-72,451.40

Finding the Fourth Proportional to 127,920.20, 191,621.10 and 72,451.40

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Solution

The fourth proportional to 127,920.20, 191,621.10 and 72,451.40 is: 108,530.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,920.20 : 191,621.10 = 72,451.40 : x
  2. Step 2: Convert to fraction form
    127,920.20/191,621.10 = 72,451.40/x
  3. Step 3: Cross multiply
    127,920.20x = 191,621.10 × 72,451.40
  4. Step 4: Simplify right side
    127,920.20x = 13,883,216,964.54
  5. Step 5: Solve for x
    x = 13,883,216,964.54/127,920.20
  6. Step 6: Final answer
    x = 108,530.29

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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.