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Finding the Fourth Proportional to 199,967.61, 299,951.72 and 80,078.55

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Solution

The fourth proportional to 199,967.61, 299,951.72 and 80,078.55 is: 120,117.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,967.61 : 299,951.72 = 80,078.55 : x
  2. Step 2: Convert to fraction form
    199,967.61/299,951.72 = 80,078.55/x
  3. Step 3: Cross multiply
    199,967.61x = 299,951.72 × 80,078.55
  4. Step 4: Simplify right side
    199,967.61x = 24,019,698,807.61
  5. Step 5: Solve for x
    x = 24,019,698,807.61/199,967.61
  6. Step 6: Final answer
    x = 120,117.95

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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.