Home / 90,779.40-136,053.90-80,872.20

Finding the Fourth Proportional to 90,779.40, 136,053.90 and 80,872.20

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Solution

The fourth proportional to 90,779.40, 136,053.90 and 80,872.20 is: 121,205.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,779.40 : 136,053.90 = 80,872.20 : x
  2. Step 2: Convert to fraction form
    90,779.40/136,053.90 = 80,872.20/x
  3. Step 3: Cross multiply
    90,779.40x = 136,053.90 × 80,872.20
  4. Step 4: Simplify right side
    90,779.40x = 11,002,978,211.58
  5. Step 5: Solve for x
    x = 11,002,978,211.58/90,779.40
  6. Step 6: Final answer
    x = 121,205.67

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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.