Home / 426,090.48-639,026.36-126,501.55

Finding the Fourth Proportional to 426,090.48, 639,026.36 and 126,501.55

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Solution

The fourth proportional to 426,090.48, 639,026.36 and 126,501.55 is: 189,719.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,090.48 : 639,026.36 = 126,501.55 : x
  2. Step 2: Convert to fraction form
    426,090.48/639,026.36 = 126,501.55/x
  3. Step 3: Cross multiply
    426,090.48x = 639,026.36 × 126,501.55
  4. Step 4: Simplify right side
    426,090.48x = 80,837,823,986.74
  5. Step 5: Solve for x
    x = 80,837,823,986.74/426,090.48
  6. Step 6: Final answer
    x = 189,719.86

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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.