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Finding the Fourth Proportional to 98,620.50, 136,098.45 and 53,908.50

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Solution

The fourth proportional to 98,620.50, 136,098.45 and 53,908.50 is: 74,394.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,620.50 : 136,098.45 = 53,908.50 : x
  2. Step 2: Convert to fraction form
    98,620.50/136,098.45 = 53,908.50/x
  3. Step 3: Cross multiply
    98,620.50x = 136,098.45 × 53,908.50
  4. Step 4: Simplify right side
    98,620.50x = 7,336,863,291.83
  5. Step 5: Solve for x
    x = 7,336,863,291.83/98,620.50
  6. Step 6: Final answer
    x = 74,394.91

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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.