Home / 138,119.74-190,606.26-77,689.90

Finding the Fourth Proportional to 138,119.74, 190,606.26 and 77,689.90

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Solution

The fourth proportional to 138,119.74, 190,606.26 and 77,689.90 is: 107,212.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,119.74 : 190,606.26 = 77,689.90 : x
  2. Step 2: Convert to fraction form
    138,119.74/190,606.26 = 77,689.90/x
  3. Step 3: Cross multiply
    138,119.74x = 190,606.26 × 77,689.90
  4. Step 4: Simplify right side
    138,119.74x = 14,808,181,278.77
  5. Step 5: Solve for x
    x = 14,808,181,278.77/138,119.74
  6. Step 6: Final answer
    x = 107,212.64

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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.