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Finding the Fourth Proportional to 77,788.54, 107,316.24 and 57,694.87

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Solution

The fourth proportional to 77,788.54, 107,316.24 and 57,694.87 is: 79,595.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,788.54 : 107,316.24 = 57,694.87 : x
  2. Step 2: Convert to fraction form
    77,788.54/107,316.24 = 57,694.87/x
  3. Step 3: Cross multiply
    77,788.54x = 107,316.24 × 57,694.87
  4. Step 4: Simplify right side
    77,788.54x = 6,191,596,515.69
  5. Step 5: Solve for x
    x = 6,191,596,515.69/77,788.54
  6. Step 6: Final answer
    x = 79,595.23

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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.