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Finding the Fourth Proportional to 199,307.60, 299,014.20 and 86,939.60

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Solution

The fourth proportional to 199,307.60, 299,014.20 and 86,939.60 is: 130,432.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,307.60 : 299,014.20 = 86,939.60 : x
  2. Step 2: Convert to fraction form
    199,307.60/299,014.20 = 86,939.60/x
  3. Step 3: Cross multiply
    199,307.60x = 299,014.20 × 86,939.60
  4. Step 4: Simplify right side
    199,307.60x = 25,996,174,942.32
  5. Step 5: Solve for x
    x = 25,996,174,942.32/199,307.60
  6. Step 6: Final answer
    x = 130,432.43

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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.