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Finding the Fourth Proportional to 128,246.30, 192,139.05 and 109,814.30

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Solution

The fourth proportional to 128,246.30, 192,139.05 and 109,814.30 is: 164,524.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,246.30 : 192,139.05 = 109,814.30 : x
  2. Step 2: Convert to fraction form
    128,246.30/192,139.05 = 109,814.30/x
  3. Step 3: Cross multiply
    128,246.30x = 192,139.05 × 109,814.30
  4. Step 4: Simplify right side
    128,246.30x = 21,099,615,278.42
  5. Step 5: Solve for x
    x = 21,099,615,278.42/128,246.30
  6. Step 6: Final answer
    x = 164,524.16

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1.5x scale

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.