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Finding the Fourth Proportional to 205,937.60, 308,906.40 and 87,612.80

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Solution

The fourth proportional to 205,937.60, 308,906.40 and 87,612.80 is: 131,419.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,937.60 : 308,906.40 = 87,612.80 : x
  2. Step 2: Convert to fraction form
    205,937.60/308,906.40 = 87,612.80/x
  3. Step 3: Cross multiply
    205,937.60x = 308,906.40 × 87,612.80
  4. Step 4: Simplify right side
    205,937.60x = 27,064,154,641.92
  5. Step 5: Solve for x
    x = 27,064,154,641.92/205,937.60
  6. Step 6: Final answer
    x = 131,419.20

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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.