Home / 138,277.50-190,421.07-120,119.88

Finding the Fourth Proportional to 138,277.50, 190,421.07 and 120,119.88

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Solution

The fourth proportional to 138,277.50, 190,421.07 and 120,119.88 is: 165,416.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,277.50 : 190,421.07 = 120,119.88 : x
  2. Step 2: Convert to fraction form
    138,277.50/190,421.07 = 120,119.88/x
  3. Step 3: Cross multiply
    138,277.50x = 190,421.07 × 120,119.88
  4. Step 4: Simplify right side
    138,277.50x = 22,873,356,077.87
  5. Step 5: Solve for x
    x = 22,873,356,077.87/138,277.50
  6. Step 6: Final answer
    x = 165,416.33

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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.