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Finding the Fourth Proportional to 192,094.40, 288,138.90 and 86,913.20

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Solution

The fourth proportional to 192,094.40, 288,138.90 and 86,913.20 is: 130,368.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,094.40 : 288,138.90 = 86,913.20 : x
  2. Step 2: Convert to fraction form
    192,094.40/288,138.90 = 86,913.20/x
  3. Step 3: Cross multiply
    192,094.40x = 288,138.90 × 86,913.20
  4. Step 4: Simplify right side
    192,094.40x = 25,043,073,843.48
  5. Step 5: Solve for x
    x = 25,043,073,843.48/192,094.40
  6. Step 6: Final answer
    x = 130,368.58

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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.