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Finding the Fourth Proportional to 78,608.10, 117,680.09 and 51,904.83

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Solution

The fourth proportional to 78,608.10, 117,680.09 and 51,904.83 is: 77,704.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,608.10 : 117,680.09 = 51,904.83 : x
  2. Step 2: Convert to fraction form
    78,608.10/117,680.09 = 51,904.83/x
  3. Step 3: Cross multiply
    78,608.10x = 117,680.09 × 51,904.83
  4. Step 4: Simplify right side
    78,608.10x = 6,108,164,806.31
  5. Step 5: Solve for x
    x = 6,108,164,806.31/78,608.10
  6. Step 6: Final answer
    x = 77,704.01

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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.