Home / 80,784.04-120,987.96-77,981.44

Finding the Fourth Proportional to 80,784.04, 120,987.96 and 77,981.44

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Solution

The fourth proportional to 80,784.04, 120,987.96 and 77,981.44 is: 116,790.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,784.04 : 120,987.96 = 77,981.44 : x
  2. Step 2: Convert to fraction form
    80,784.04/120,987.96 = 77,981.44/x
  3. Step 3: Cross multiply
    80,784.04x = 120,987.96 × 77,981.44
  4. Step 4: Simplify right side
    80,784.04x = 9,434,815,343.46
  5. Step 5: Solve for x
    x = 9,434,815,343.46/80,784.04
  6. Step 6: Final answer
    x = 116,790.59

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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.