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Finding the Fourth Proportional to 136,289.60, 188,078.28 and 75,859.28

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Solution

The fourth proportional to 136,289.60, 188,078.28 and 75,859.28 is: 104,685.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,289.60 : 188,078.28 = 75,859.28 : x
  2. Step 2: Convert to fraction form
    136,289.60/188,078.28 = 75,859.28/x
  3. Step 3: Cross multiply
    136,289.60x = 188,078.28 × 75,859.28
  4. Step 4: Simplify right side
    136,289.60x = 14,267,482,904.44
  5. Step 5: Solve for x
    x = 14,267,482,904.44/136,289.60
  6. Step 6: Final answer
    x = 104,685.04

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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.