Home / 80,774.20-121,161.30-45,782.20

Finding the Fourth Proportional to 80,774.20, 121,161.30 and 45,782.20

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Solution

The fourth proportional to 80,774.20, 121,161.30 and 45,782.20 is: 68,673.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,774.20 : 121,161.30 = 45,782.20 : x
  2. Step 2: Convert to fraction form
    80,774.20/121,161.30 = 45,782.20/x
  3. Step 3: Cross multiply
    80,774.20x = 121,161.30 × 45,782.20
  4. Step 4: Simplify right side
    80,774.20x = 5,547,030,868.86
  5. Step 5: Solve for x
    x = 5,547,030,868.86/80,774.20
  6. Step 6: Final answer
    x = 68,673.30

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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.