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Finding the Fourth Proportional to 81,406.70, 122,124.45 and 28,846.70

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Solution

The fourth proportional to 81,406.70, 122,124.45 and 28,846.70 is: 43,275.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,406.70 : 122,124.45 = 28,846.70 : x
  2. Step 2: Convert to fraction form
    81,406.70/122,124.45 = 28,846.70/x
  3. Step 3: Cross multiply
    81,406.70x = 122,124.45 × 28,846.70
  4. Step 4: Simplify right side
    81,406.70x = 3,522,887,371.82
  5. Step 5: Solve for x
    x = 3,522,887,371.82/81,406.70
  6. Step 6: Final answer
    x = 43,275.15

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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.