Home / 268,470.20-402,705.30-128,502.20

Finding the Fourth Proportional to 268,470.20, 402,705.30 and 128,502.20

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Solution

The fourth proportional to 268,470.20, 402,705.30 and 128,502.20 is: 192,753.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,470.20 : 402,705.30 = 128,502.20 : x
  2. Step 2: Convert to fraction form
    268,470.20/402,705.30 = 128,502.20/x
  3. Step 3: Cross multiply
    268,470.20x = 402,705.30 × 128,502.20
  4. Step 4: Simplify right side
    268,470.20x = 51,748,517,001.66
  5. Step 5: Solve for x
    x = 51,748,517,001.66/268,470.20
  6. Step 6: Final answer
    x = 192,753.30

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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.