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Finding the Fourth Proportional to 199,406.64, 298,940.13 and 87,004.56

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Solution

The fourth proportional to 199,406.64, 298,940.13 and 87,004.56 is: 130,432.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,406.64 : 298,940.13 = 87,004.56 : x
  2. Step 2: Convert to fraction form
    199,406.64/298,940.13 = 87,004.56/x
  3. Step 3: Cross multiply
    199,406.64x = 298,940.13 × 87,004.56
  4. Step 4: Simplify right side
    199,406.64x = 26,009,154,476.99
  5. Step 5: Solve for x
    x = 26,009,154,476.99/199,406.64
  6. Step 6: Final answer
    x = 130,432.74

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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.