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Finding the Fourth Proportional to 199,479.79, 298,961.16 and 81,013.51

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Solution

The fourth proportional to 199,479.79, 298,961.16 and 81,013.51 is: 121,415.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,479.79 : 298,961.16 = 81,013.51 : x
  2. Step 2: Convert to fraction form
    199,479.79/298,961.16 = 81,013.51/x
  3. Step 3: Cross multiply
    199,479.79x = 298,961.16 × 81,013.51
  4. Step 4: Simplify right side
    199,479.79x = 24,219,892,925.27
  5. Step 5: Solve for x
    x = 24,219,892,925.27/199,479.79
  6. Step 6: Final answer
    x = 121,415.27

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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.