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Finding the Fourth Proportional to 99,200.61, 136,898.47 and 53,878.62

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Solution

The fourth proportional to 99,200.61, 136,898.47 and 53,878.62 is: 74,353.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,200.61 : 136,898.47 = 53,878.62 : x
  2. Step 2: Convert to fraction form
    99,200.61/136,898.47 = 53,878.62/x
  3. Step 3: Cross multiply
    99,200.61x = 136,898.47 × 53,878.62
  4. Step 4: Simplify right side
    99,200.61x = 7,375,901,120.65
  5. Step 5: Solve for x
    x = 7,375,901,120.65/99,200.61
  6. Step 6: Final answer
    x = 74,353.39

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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.