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Finding the Fourth Proportional to 84,614.88, 126,928.70 and 28,455.15

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Solution

The fourth proportional to 84,614.88, 126,928.70 and 28,455.15 is: 42,684.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,614.88 : 126,928.70 = 28,455.15 : x
  2. Step 2: Convert to fraction form
    84,614.88/126,928.70 = 28,455.15/x
  3. Step 3: Cross multiply
    84,614.88x = 126,928.70 × 28,455.15
  4. Step 4: Simplify right side
    84,614.88x = 3,611,775,197.81
  5. Step 5: Solve for x
    x = 3,611,775,197.81/84,614.88
  6. Step 6: Final answer
    x = 42,684.87

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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.