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Finding the Fourth Proportional to 98,488.78, 135,912.73 and 56,046.38

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Solution

The fourth proportional to 98,488.78, 135,912.73 and 56,046.38 is: 77,342.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,488.78 : 135,912.73 = 56,046.38 : x
  2. Step 2: Convert to fraction form
    98,488.78/135,912.73 = 56,046.38/x
  3. Step 3: Cross multiply
    98,488.78x = 135,912.73 × 56,046.38
  4. Step 4: Simplify right side
    98,488.78x = 7,617,416,512.42
  5. Step 5: Solve for x
    x = 7,617,416,512.42/98,488.78
  6. Step 6: Final answer
    x = 77,342.99

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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.