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Finding the Fourth Proportional to 76,862.74, 114,529.99 and 68,478.33

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Solution

The fourth proportional to 76,862.74, 114,529.99 and 68,478.33 is: 102,036.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,862.74 : 114,529.99 = 68,478.33 : x
  2. Step 2: Convert to fraction form
    76,862.74/114,529.99 = 68,478.33/x
  3. Step 3: Cross multiply
    76,862.74x = 114,529.99 × 68,478.33
  4. Step 4: Simplify right side
    76,862.74x = 7,842,822,450.12
  5. Step 5: Solve for x
    x = 7,842,822,450.12/76,862.74
  6. Step 6: Final answer
    x = 102,036.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.