Home / 80,779.40-121,154.70-51,144.20

Finding the Fourth Proportional to 80,779.40, 121,154.70 and 51,144.20

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Solution

The fourth proportional to 80,779.40, 121,154.70 and 51,144.20 is: 76,707.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,779.40 : 121,154.70 = 51,144.20 : x
  2. Step 2: Convert to fraction form
    80,779.40/121,154.70 = 51,144.20/x
  3. Step 3: Cross multiply
    80,779.40x = 121,154.70 × 51,144.20
  4. Step 4: Simplify right side
    80,779.40x = 6,196,360,207.74
  5. Step 5: Solve for x
    x = 6,196,360,207.74/80,779.40
  6. Step 6: Final answer
    x = 76,707.18

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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.