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Finding the Fourth Proportional to 99,128, 136,797.60 and 54,416.96

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Solution

The fourth proportional to 99,128, 136,797.60 and 54,416.96 is: 75,095.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,128 : 136,797.60 = 54,416.96 : x
  2. Step 2: Convert to fraction form
    99,128/136,797.60 = 54,416.96/x
  3. Step 3: Cross multiply
    99,128x = 136,797.60 × 54,416.96
  4. Step 4: Simplify right side
    99,128x = 7,444,109,527.30
  5. Step 5: Solve for x
    x = 7,444,109,527.30/99,128
  6. Step 6: Final answer
    x = 75,095.93

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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.