Home / 126,921.28-190,398.12-42,645.28

Finding the Fourth Proportional to 126,921.28, 190,398.12 and 42,645.28

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Solution

The fourth proportional to 126,921.28, 190,398.12 and 42,645.28 is: 63,973.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,921.28 : 190,398.12 = 42,645.28 : x
  2. Step 2: Convert to fraction form
    126,921.28/190,398.12 = 42,645.28/x
  3. Step 3: Cross multiply
    126,921.28x = 190,398.12 × 42,645.28
  4. Step 4: Simplify right side
    126,921.28x = 8,119,581,138.87
  5. Step 5: Solve for x
    x = 8,119,581,138.87/126,921.28
  6. Step 6: Final answer
    x = 63,973.36

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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.