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Finding the Fourth Proportional to 72,161.76, 108,239.16 and 48,479.28

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Solution

The fourth proportional to 72,161.76, 108,239.16 and 48,479.28 is: 72,716.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,161.76 : 108,239.16 = 48,479.28 : x
  2. Step 2: Convert to fraction form
    72,161.76/108,239.16 = 48,479.28/x
  3. Step 3: Cross multiply
    72,161.76x = 108,239.16 × 48,479.28
  4. Step 4: Simplify right side
    72,161.76x = 5,247,356,544.60
  5. Step 5: Solve for x
    x = 5,247,356,544.60/72,161.76
  6. Step 6: Final answer
    x = 72,716.58

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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.