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Finding the Fourth Proportional to 170,212.79, 255,360.20 and 51,876.86

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Solution

The fourth proportional to 170,212.79, 255,360.20 and 51,876.86 is: 77,827.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,212.79 : 255,360.20 = 51,876.86 : x
  2. Step 2: Convert to fraction form
    170,212.79/255,360.20 = 51,876.86/x
  3. Step 3: Cross multiply
    170,212.79x = 255,360.20 × 51,876.86
  4. Step 4: Simplify right side
    170,212.79x = 13,247,283,808.79
  5. Step 5: Solve for x
    x = 13,247,283,808.79/170,212.79
  6. Step 6: Final answer
    x = 77,827.78

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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.