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Finding the Fourth Proportional to 99,219.72, 136,924.65 and 53,898.54

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Solution

The fourth proportional to 99,219.72, 136,924.65 and 53,898.54 is: 74,380.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,219.72 : 136,924.65 = 53,898.54 : x
  2. Step 2: Convert to fraction form
    99,219.72/136,924.65 = 53,898.54/x
  3. Step 3: Cross multiply
    99,219.72x = 136,924.65 × 53,898.54
  4. Step 4: Simplify right side
    99,219.72x = 7,380,038,725.01
  5. Step 5: Solve for x
    x = 7,380,038,725.01/99,219.72
  6. Step 6: Final answer
    x = 74,380.77

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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.