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Finding the Fourth Proportional to 99,215, 136,917.72 and 53,893.84

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Solution

The fourth proportional to 99,215, 136,917.72 and 53,893.84 is: 74,374.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,215 : 136,917.72 = 53,893.84 : x
  2. Step 2: Convert to fraction form
    99,215/136,917.72 = 53,893.84/x
  3. Step 3: Cross multiply
    99,215x = 136,917.72 × 53,893.84
  4. Step 4: Simplify right side
    99,215x = 7,379,021,694.84
  5. Step 5: Solve for x
    x = 7,379,021,694.84/99,215
  6. Step 6: Final answer
    x = 74,374.05

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1.5x scale

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.