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Finding the Fourth Proportional to 80,902.92, 111,391.95 and 68,779.55

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Solution

The fourth proportional to 80,902.92, 111,391.95 and 68,779.55 is: 94,699.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,902.92 : 111,391.95 = 68,779.55 : x
  2. Step 2: Convert to fraction form
    80,902.92/111,391.95 = 68,779.55/x
  3. Step 3: Cross multiply
    80,902.92x = 111,391.95 × 68,779.55
  4. Step 4: Simplify right side
    80,902.92x = 7,661,487,637.66
  5. Step 5: Solve for x
    x = 7,661,487,637.66/80,902.92
  6. Step 6: Final answer
    x = 94,699.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.