Home / 140,031.12-193,240.86-76,368.78

Finding the Fourth Proportional to 140,031.12, 193,240.86 and 76,368.78

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Solution

The fourth proportional to 140,031.12, 193,240.86 and 76,368.78 is: 105,387.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,031.12 : 193,240.86 = 76,368.78 : x
  2. Step 2: Convert to fraction form
    140,031.12/193,240.86 = 76,368.78/x
  3. Step 3: Cross multiply
    140,031.12x = 193,240.86 × 76,368.78
  4. Step 4: Simplify right side
    140,031.12x = 14,757,568,724.35
  5. Step 5: Solve for x
    x = 14,757,568,724.35/140,031.12
  6. Step 6: Final answer
    x = 105,387.78

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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.