Home / 138,649.12-191,335.78-74,986.91

Finding the Fourth Proportional to 138,649.12, 191,335.78 and 74,986.91

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Solution

The fourth proportional to 138,649.12, 191,335.78 and 74,986.91 is: 103,481.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,649.12 : 191,335.78 = 74,986.91 : x
  2. Step 2: Convert to fraction form
    138,649.12/191,335.78 = 74,986.91/x
  3. Step 3: Cross multiply
    138,649.12x = 191,335.78 × 74,986.91
  4. Step 4: Simplify right side
    138,649.12x = 14,347,678,914.64
  5. Step 5: Solve for x
    x = 14,347,678,914.64/138,649.12
  6. Step 6: Final answer
    x = 103,481.93

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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.