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Finding the Fourth Proportional to 199,810.38, 299,520.74 and 79,831.56

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Solution

The fourth proportional to 199,810.38, 299,520.74 and 79,831.56 is: 119,669.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,810.38 : 299,520.74 = 79,831.56 : x
  2. Step 2: Convert to fraction form
    199,810.38/299,520.74 = 79,831.56/x
  3. Step 3: Cross multiply
    199,810.38x = 299,520.74 × 79,831.56
  4. Step 4: Simplify right side
    199,810.38x = 23,911,207,926.55
  5. Step 5: Solve for x
    x = 23,911,207,926.55/199,810.38
  6. Step 6: Final answer
    x = 119,669.50

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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.