Home / 138,215.68-190,725.24-77,791.12

Finding the Fourth Proportional to 138,215.68, 190,725.24 and 77,791.12

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Solution

The fourth proportional to 138,215.68, 190,725.24 and 77,791.12 is: 107,344.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,215.68 : 190,725.24 = 77,791.12 : x
  2. Step 2: Convert to fraction form
    138,215.68/190,725.24 = 77,791.12/x
  3. Step 3: Cross multiply
    138,215.68x = 190,725.24 × 77,791.12
  4. Step 4: Simplify right side
    138,215.68x = 14,836,730,031.87
  5. Step 5: Solve for x
    x = 14,836,730,031.87/138,215.68
  6. Step 6: Final answer
    x = 107,344.77

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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.