Home / 138,225.20-190,756.91-77,799.75

Finding the Fourth Proportional to 138,225.20, 190,756.91 and 77,799.75

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Solution

The fourth proportional to 138,225.20, 190,756.91 and 77,799.75 is: 107,367.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,225.20 : 190,756.91 = 77,799.75 : x
  2. Step 2: Convert to fraction form
    138,225.20/190,756.91 = 77,799.75/x
  3. Step 3: Cross multiply
    138,225.20x = 190,756.91 × 77,799.75
  4. Step 4: Simplify right side
    138,225.20x = 14,840,839,519.77
  5. Step 5: Solve for x
    x = 14,840,839,519.77/138,225.20
  6. Step 6: Final answer
    x = 107,367.11

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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.