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Finding the Fourth Proportional to 81,572.99, 122,333.57 and 55,445.63

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Solution

The fourth proportional to 81,572.99, 122,333.57 and 55,445.63 is: 83,150.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,572.99 : 122,333.57 = 55,445.63 : x
  2. Step 2: Convert to fraction form
    81,572.99/122,333.57 = 55,445.63/x
  3. Step 3: Cross multiply
    81,572.99x = 122,333.57 × 55,445.63
  4. Step 4: Simplify right side
    81,572.99x = 6,782,861,581.57
  5. Step 5: Solve for x
    x = 6,782,861,581.57/81,572.99
  6. Step 6: Final answer
    x = 83,150.83

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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.