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Finding the Fourth Proportional to 128,047.60, 192,100.20 and 39,305.20

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Solution

The fourth proportional to 128,047.60, 192,100.20 and 39,305.20 is: 58,966.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,047.60 : 192,100.20 = 39,305.20 : x
  2. Step 2: Convert to fraction form
    128,047.60/192,100.20 = 39,305.20/x
  3. Step 3: Cross multiply
    128,047.60x = 192,100.20 × 39,305.20
  4. Step 4: Simplify right side
    128,047.60x = 7,550,536,781.04
  5. Step 5: Solve for x
    x = 7,550,536,781.04/128,047.60
  6. Step 6: Final answer
    x = 58,966.64

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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.