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Finding the Fourth Proportional to 72,225.68, 108,879.80 and 67,408.81

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Solution

The fourth proportional to 72,225.68, 108,879.80 and 67,408.81 is: 101,618.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,225.68 : 108,879.80 = 67,408.81 : x
  2. Step 2: Convert to fraction form
    72,225.68/108,879.80 = 67,408.81/x
  3. Step 3: Cross multiply
    72,225.68x = 108,879.80 × 67,408.81
  4. Step 4: Simplify right side
    72,225.68x = 7,339,457,141.79
  5. Step 5: Solve for x
    x = 7,339,457,141.79/72,225.68
  6. Step 6: Final answer
    x = 101,618.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.