Home / 81,941.68-122,942.09-28,641.55

Finding the Fourth Proportional to 81,941.68, 122,942.09 and 28,641.55

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Solution

The fourth proportional to 81,941.68, 122,942.09 and 28,641.55 is: 42,972.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,941.68 : 122,942.09 = 28,641.55 : x
  2. Step 2: Convert to fraction form
    81,941.68/122,942.09 = 28,641.55/x
  3. Step 3: Cross multiply
    81,941.68x = 122,942.09 × 28,641.55
  4. Step 4: Simplify right side
    81,941.68x = 3,521,252,017.84
  5. Step 5: Solve for x
    x = 3,521,252,017.84/81,941.68
  6. Step 6: Final answer
    x = 42,972.66

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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.