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Finding the Fourth Proportional to 77,790.87, 107,125.54 and 67,577.27

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Solution

The fourth proportional to 77,790.87, 107,125.54 and 67,577.27 is: 93,060.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,790.87 : 107,125.54 = 67,577.27 : x
  2. Step 2: Convert to fraction form
    77,790.87/107,125.54 = 67,577.27/x
  3. Step 3: Cross multiply
    77,790.87x = 107,125.54 × 67,577.27
  4. Step 4: Simplify right side
    77,790.87x = 7,239,250,835.90
  5. Step 5: Solve for x
    x = 7,239,250,835.90/77,790.87
  6. Step 6: Final answer
    x = 93,060.42

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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.