Home / 140,248,143.74-193,538,725.17-78,368,990.78

Finding the Fourth Proportional to 140,248,143.74, 193,538,725.17 and 78,368,990.78

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Solution

The fourth proportional to 140,248,143.74, 193,538,725.17 and 78,368,990.78 is: 108,147,132.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,248,143.74 : 193,538,725.17 = 78,368,990.78 : x
  2. Step 2: Convert to fraction form
    140,248,143.74/193,538,725.17 = 78,368,990.78/x
  3. Step 3: Cross multiply
    140,248,143.74x = 193,538,725.17 × 78,368,990.78
  4. Step 4: Simplify right side
    140,248,143.74x = 15,167,434,568,420,684
  5. Step 5: Solve for x
    x = 15,167,434,568,420,684/140,248,143.74
  6. Step 6: Final answer
    x = 108,147,132.39

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1.5x scale

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.