Home / 80,688.82-121,049.64-28,102.40

Finding the Fourth Proportional to 80,688.82, 121,049.64 and 28,102.40

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Solution

The fourth proportional to 80,688.82, 121,049.64 and 28,102.40 is: 42,159.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,688.82 : 121,049.64 = 28,102.40 : x
  2. Step 2: Convert to fraction form
    80,688.82/121,049.64 = 28,102.40/x
  3. Step 3: Cross multiply
    80,688.82x = 121,049.64 × 28,102.40
  4. Step 4: Simplify right side
    80,688.82x = 3,401,785,403.14
  5. Step 5: Solve for x
    x = 3,401,785,403.14/80,688.82
  6. Step 6: Final answer
    x = 42,159.32

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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.