Home / 42,478.68-63,739.43-30,078.39

Finding the Fourth Proportional to 42,478.68, 63,739.43 and 30,078.39

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Solution

The fourth proportional to 42,478.68, 63,739.43 and 30,078.39 is: 45,132.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,478.68 : 63,739.43 = 30,078.39 : x
  2. Step 2: Convert to fraction form
    42,478.68/63,739.43 = 30,078.39/x
  3. Step 3: Cross multiply
    42,478.68x = 63,739.43 × 30,078.39
  4. Step 4: Simplify right side
    42,478.68x = 1,917,179,433.92
  5. Step 5: Solve for x
    x = 1,917,179,433.92/42,478.68
  6. Step 6: Final answer
    x = 45,132.75

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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.