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Finding the Fourth Proportional to 84,451.56, 126,683.02 and 28,289.40

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Solution

The fourth proportional to 84,451.56, 126,683.02 and 28,289.40 is: 42,436.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,451.56 : 126,683.02 = 28,289.40 : x
  2. Step 2: Convert to fraction form
    84,451.56/126,683.02 = 28,289.40/x
  3. Step 3: Cross multiply
    84,451.56x = 126,683.02 × 28,289.40
  4. Step 4: Simplify right side
    84,451.56x = 3,583,786,625.99
  5. Step 5: Solve for x
    x = 3,583,786,625.99/84,451.56
  6. Step 6: Final answer
    x = 42,436.00

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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.