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Finding the Fourth Proportional to 199,308.60, 299,015.70 and 86,940.60

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Solution

The fourth proportional to 199,308.60, 299,015.70 and 86,940.60 is: 130,433.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,308.60 : 299,015.70 = 86,940.60 : x
  2. Step 2: Convert to fraction form
    199,308.60/299,015.70 = 86,940.60/x
  3. Step 3: Cross multiply
    199,308.60x = 299,015.70 × 86,940.60
  4. Step 4: Simplify right side
    199,308.60x = 25,996,604,367.42
  5. Step 5: Solve for x
    x = 25,996,604,367.42/199,308.60
  6. Step 6: Final answer
    x = 130,433.93

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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.