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Finding the Fourth Proportional to 82,840.80, 124,138.32 and 60,845.28

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Solution

The fourth proportional to 82,840.80, 124,138.32 and 60,845.28 is: 91,177.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,840.80 : 124,138.32 = 60,845.28 : x
  2. Step 2: Convert to fraction form
    82,840.80/124,138.32 = 60,845.28/x
  3. Step 3: Cross multiply
    82,840.80x = 124,138.32 × 60,845.28
  4. Step 4: Simplify right side
    82,840.80x = 7,553,230,839.13
  5. Step 5: Solve for x
    x = 7,553,230,839.13/82,840.80
  6. Step 6: Final answer
    x = 91,177.67

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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.