Home / 57,112.86-78,815.93-30,918.84

Finding the Fourth Proportional to 57,112.86, 78,815.93 and 30,918.84

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Solution

The fourth proportional to 57,112.86, 78,815.93 and 30,918.84 is: 42,668.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,112.86 : 78,815.93 = 30,918.84 : x
  2. Step 2: Convert to fraction form
    57,112.86/78,815.93 = 30,918.84/x
  3. Step 3: Cross multiply
    57,112.86x = 78,815.93 × 30,918.84
  4. Step 4: Simplify right side
    57,112.86x = 2,436,896,974.53
  5. Step 5: Solve for x
    x = 2,436,896,974.53/57,112.86
  6. Step 6: Final answer
    x = 42,668.10

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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.