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Finding the Fourth Proportional to 205,781.60, 309,190.80 and 130,937.60

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Solution

The fourth proportional to 205,781.60, 309,190.80 and 130,937.60 is: 196,736.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,781.60 : 309,190.80 = 130,937.60 : x
  2. Step 2: Convert to fraction form
    205,781.60/309,190.80 = 130,937.60/x
  3. Step 3: Cross multiply
    205,781.60x = 309,190.80 × 130,937.60
  4. Step 4: Simplify right side
    205,781.60x = 40,484,701,294.08
  5. Step 5: Solve for x
    x = 40,484,701,294.08/205,781.60
  6. Step 6: Final answer
    x = 196,736.25

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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.