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Finding the Fourth Proportional to 77,100.99, 115,558.92 and 39,678.72

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Solution

The fourth proportional to 77,100.99, 115,558.92 and 39,678.72 is: 59,470.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,100.99 : 115,558.92 = 39,678.72 : x
  2. Step 2: Convert to fraction form
    77,100.99/115,558.92 = 39,678.72/x
  3. Step 3: Cross multiply
    77,100.99x = 115,558.92 × 39,678.72
  4. Step 4: Simplify right side
    77,100.99x = 4,585,230,030.18
  5. Step 5: Solve for x
    x = 4,585,230,030.18/77,100.99
  6. Step 6: Final answer
    x = 59,470.44

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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.