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Finding the Fourth Proportional to 128,052.60, 192,078.90 and 39,306.30

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Solution

The fourth proportional to 128,052.60, 192,078.90 and 39,306.30 is: 58,959.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,052.60 : 192,078.90 = 39,306.30 : x
  2. Step 2: Convert to fraction form
    128,052.60/192,078.90 = 39,306.30/x
  3. Step 3: Cross multiply
    128,052.60x = 192,078.90 × 39,306.30
  4. Step 4: Simplify right side
    128,052.60x = 7,549,910,867.07
  5. Step 5: Solve for x
    x = 7,549,910,867.07/128,052.60
  6. Step 6: Final answer
    x = 58,959.45

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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.