Home / 80,908.85-121,417.26-28,318.34

Finding the Fourth Proportional to 80,908.85, 121,417.26 and 28,318.34

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Solution

The fourth proportional to 80,908.85, 121,417.26 and 28,318.34 is: 42,496.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,908.85 : 121,417.26 = 28,318.34 : x
  2. Step 2: Convert to fraction form
    80,908.85/121,417.26 = 28,318.34/x
  3. Step 3: Cross multiply
    80,908.85x = 121,417.26 × 28,318.34
  4. Step 4: Simplify right side
    80,908.85x = 3,438,335,250.55
  5. Step 5: Solve for x
    x = 3,438,335,250.55/80,908.85
  6. Step 6: Final answer
    x = 42,496.40

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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.