Home / 458,688.20-687,763.02-138,743.80

Finding the Fourth Proportional to 458,688.20, 687,763.02 and 138,743.80

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Solution

The fourth proportional to 458,688.20, 687,763.02 and 138,743.80 is: 208,034.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,688.20 : 687,763.02 = 138,743.80 : x
  2. Step 2: Convert to fraction form
    458,688.20/687,763.02 = 138,743.80/x
  3. Step 3: Cross multiply
    458,688.20x = 687,763.02 × 138,743.80
  4. Step 4: Simplify right side
    458,688.20x = 95,422,854,894.28
  5. Step 5: Solve for x
    x = 95,422,854,894.28/458,688.20
  6. Step 6: Final answer
    x = 208,034.25

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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.