Home / 426,256.80-639,385.12-126,736.16

Finding the Fourth Proportional to 426,256.80, 639,385.12 and 126,736.16

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Solution

The fourth proportional to 426,256.80, 639,385.12 and 126,736.16 is: 190,104.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,256.80 : 639,385.12 = 126,736.16 : x
  2. Step 2: Convert to fraction form
    426,256.80/639,385.12 = 126,736.16/x
  3. Step 3: Cross multiply
    426,256.80x = 639,385.12 × 126,736.16
  4. Step 4: Simplify right side
    426,256.80x = 81,033,214,869.94
  5. Step 5: Solve for x
    x = 81,033,214,869.94/426,256.80
  6. Step 6: Final answer
    x = 190,104.22

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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.