Home / 139,924.20-209,886.30-80,729.40

Finding the Fourth Proportional to 139,924.20, 209,886.30 and 80,729.40

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Solution

The fourth proportional to 139,924.20, 209,886.30 and 80,729.40 is: 121,094.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,924.20 : 209,886.30 = 80,729.40 : x
  2. Step 2: Convert to fraction form
    139,924.20/209,886.30 = 80,729.40/x
  3. Step 3: Cross multiply
    139,924.20x = 209,886.30 × 80,729.40
  4. Step 4: Simplify right side
    139,924.20x = 16,943,995,067.22
  5. Step 5: Solve for x
    x = 16,943,995,067.22/139,924.20
  6. Step 6: Final answer
    x = 121,094.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.