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Finding the Fourth Proportional to 139,224.83, 192,124.44 and 78,798.80

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Solution

The fourth proportional to 139,224.83, 192,124.44 and 78,798.80 is: 108,739.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,224.83 : 192,124.44 = 78,798.80 : x
  2. Step 2: Convert to fraction form
    139,224.83/192,124.44 = 78,798.80/x
  3. Step 3: Cross multiply
    139,224.83x = 192,124.44 × 78,798.80
  4. Step 4: Simplify right side
    139,224.83x = 15,139,174,362.05
  5. Step 5: Solve for x
    x = 15,139,174,362.05/139,224.83
  6. Step 6: Final answer
    x = 108,739.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.