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Finding the Fourth Proportional to 77,793.12, 107,128.64 and 67,579.52

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Solution

The fourth proportional to 77,793.12, 107,128.64 and 67,579.52 is: 93,063.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,793.12 : 107,128.64 = 67,579.52 : x
  2. Step 2: Convert to fraction form
    77,793.12/107,128.64 = 67,579.52/x
  3. Step 3: Cross multiply
    77,793.12x = 107,128.64 × 67,579.52
  4. Step 4: Simplify right side
    77,793.12x = 7,239,701,702.76
  5. Step 5: Solve for x
    x = 7,239,701,702.76/77,793.12
  6. Step 6: Final answer
    x = 93,063.52

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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.