Home / 80,855.20-121,282.80-61,026.40

Finding the Fourth Proportional to 80,855.20, 121,282.80 and 61,026.40

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Solution

The fourth proportional to 80,855.20, 121,282.80 and 61,026.40 is: 91,539.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,855.20 : 121,282.80 = 61,026.40 : x
  2. Step 2: Convert to fraction form
    80,855.20/121,282.80 = 61,026.40/x
  3. Step 3: Cross multiply
    80,855.20x = 121,282.80 × 61,026.40
  4. Step 4: Simplify right side
    80,855.20x = 7,401,452,665.92
  5. Step 5: Solve for x
    x = 7,401,452,665.92/80,855.20
  6. Step 6: Final answer
    x = 91,539.60

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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.