Home / 81,448.34-122,142.53-28,126.74

Finding the Fourth Proportional to 81,448.34, 122,142.53 and 28,126.74

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Solution

The fourth proportional to 81,448.34, 122,142.53 and 28,126.74 is: 42,179.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,448.34 : 122,142.53 = 28,126.74 : x
  2. Step 2: Convert to fraction form
    81,448.34/122,142.53 = 28,126.74/x
  3. Step 3: Cross multiply
    81,448.34x = 122,142.53 × 28,126.74
  4. Step 4: Simplify right side
    81,448.34x = 3,435,471,712.60
  5. Step 5: Solve for x
    x = 3,435,471,712.60/81,448.34
  6. Step 6: Final answer
    x = 42,179.77

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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.