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Finding the Fourth Proportional to 99,174.72, 136,873.62 and 61,454.64

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Solution

The fourth proportional to 99,174.72, 136,873.62 and 61,454.64 is: 84,815.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,174.72 : 136,873.62 = 61,454.64 : x
  2. Step 2: Convert to fraction form
    99,174.72/136,873.62 = 61,454.64/x
  3. Step 3: Cross multiply
    99,174.72x = 136,873.62 × 61,454.64
  4. Step 4: Simplify right side
    99,174.72x = 8,411,519,042.60
  5. Step 5: Solve for x
    x = 8,411,519,042.60/99,174.72
  6. Step 6: Final answer
    x = 84,815.15

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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.