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Finding the Fourth Proportional to 72,152.40, 108,358.20 and 69,819.60

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Solution

The fourth proportional to 72,152.40, 108,358.20 and 69,819.60 is: 104,854.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,152.40 : 108,358.20 = 69,819.60 : x
  2. Step 2: Convert to fraction form
    72,152.40/108,358.20 = 69,819.60/x
  3. Step 3: Cross multiply
    72,152.40x = 108,358.20 × 69,819.60
  4. Step 4: Simplify right side
    72,152.40x = 7,565,526,180.72
  5. Step 5: Solve for x
    x = 7,565,526,180.72/72,152.40
  6. Step 6: Final answer
    x = 104,854.81

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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.