Home / 80,886.90-121,330.35-78,165.30

Finding the Fourth Proportional to 80,886.90, 121,330.35 and 78,165.30

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Solution

The fourth proportional to 80,886.90, 121,330.35 and 78,165.30 is: 117,247.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,886.90 : 121,330.35 = 78,165.30 : x
  2. Step 2: Convert to fraction form
    80,886.90/121,330.35 = 78,165.30/x
  3. Step 3: Cross multiply
    80,886.90x = 121,330.35 × 78,165.30
  4. Step 4: Simplify right side
    80,886.90x = 9,483,823,206.86
  5. Step 5: Solve for x
    x = 9,483,823,206.86/80,886.90
  6. Step 6: Final answer
    x = 117,247.95

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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.