Home / 138,031.17-190,489.77-77,620.83

Finding the Fourth Proportional to 138,031.17, 190,489.77 and 77,620.83

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Solution

The fourth proportional to 138,031.17, 190,489.77 and 77,620.83 is: 107,120.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,031.17 : 190,489.77 = 77,620.83 : x
  2. Step 2: Convert to fraction form
    138,031.17/190,489.77 = 77,620.83/x
  3. Step 3: Cross multiply
    138,031.17x = 190,489.77 × 77,620.83
  4. Step 4: Simplify right side
    138,031.17x = 14,785,974,053.91
  5. Step 5: Solve for x
    x = 14,785,974,053.91/138,031.17
  6. Step 6: Final answer
    x = 107,120.54

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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.