Home / 103,645.20-143,055.76-67,921.68

Finding the Fourth Proportional to 103,645.20, 143,055.76 and 67,921.68

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Solution

The fourth proportional to 103,645.20, 143,055.76 and 67,921.68 is: 93,748.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,645.20 : 143,055.76 = 67,921.68 : x
  2. Step 2: Convert to fraction form
    103,645.20/143,055.76 = 67,921.68/x
  3. Step 3: Cross multiply
    103,645.20x = 143,055.76 × 67,921.68
  4. Step 4: Simplify right side
    103,645.20x = 9,716,587,552.88
  5. Step 5: Solve for x
    x = 9,716,587,552.88/103,645.20
  6. Step 6: Final answer
    x = 93,748.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.