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Finding the Fourth Proportional to 128,107.84, 192,079.08 and 53,279.68

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Solution

The fourth proportional to 128,107.84, 192,079.08 and 53,279.68 is: 79,885.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,107.84 : 192,079.08 = 53,279.68 : x
  2. Step 2: Convert to fraction form
    128,107.84/192,079.08 = 53,279.68/x
  3. Step 3: Cross multiply
    128,107.84x = 192,079.08 × 53,279.68
  4. Step 4: Simplify right side
    128,107.84x = 10,233,911,917.09
  5. Step 5: Solve for x
    x = 10,233,911,917.09/128,107.84
  6. Step 6: Final answer
    x = 79,885.13

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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.