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Finding the Fourth Proportional to 127,612.80, 191,419.20 and 109,898.10

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Solution

The fourth proportional to 127,612.80, 191,419.20 and 109,898.10 is: 164,847.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,612.80 : 191,419.20 = 109,898.10 : x
  2. Step 2: Convert to fraction form
    127,612.80/191,419.20 = 109,898.10/x
  3. Step 3: Cross multiply
    127,612.80x = 191,419.20 × 109,898.10
  4. Step 4: Simplify right side
    127,612.80x = 21,036,606,383.52
  5. Step 5: Solve for x
    x = 21,036,606,383.52/127,612.80
  6. Step 6: Final answer
    x = 164,847.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.