Home / 426,202.56-639,431.04-126,693.12

Finding the Fourth Proportional to 426,202.56, 639,431.04 and 126,693.12

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Solution

The fourth proportional to 426,202.56, 639,431.04 and 126,693.12 is: 190,077.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,202.56 : 639,431.04 = 126,693.12 : x
  2. Step 2: Convert to fraction form
    426,202.56/639,431.04 = 126,693.12/x
  3. Step 3: Cross multiply
    426,202.56x = 639,431.04 × 126,693.12
  4. Step 4: Simplify right side
    426,202.56x = 81,011,513,482.44
  5. Step 5: Solve for x
    x = 81,011,513,482.44/426,202.56
  6. Step 6: Final answer
    x = 190,077.49

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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.