Home / 80,718.04-121,077.78-28,127.44

Finding the Fourth Proportional to 80,718.04, 121,077.78 and 28,127.44

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Solution

The fourth proportional to 80,718.04, 121,077.78 and 28,127.44 is: 42,191.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,718.04 : 121,077.78 = 28,127.44 : x
  2. Step 2: Convert to fraction form
    80,718.04/121,077.78 = 28,127.44/x
  3. Step 3: Cross multiply
    80,718.04x = 121,077.78 × 28,127.44
  4. Step 4: Simplify right side
    80,718.04x = 3,405,607,992.28
  5. Step 5: Solve for x
    x = 3,405,607,992.28/80,718.04
  6. Step 6: Final answer
    x = 42,191.41

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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.