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Finding the Fourth Proportional to 205,937.10, 308,905.65 and 87,612.30

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Solution

The fourth proportional to 205,937.10, 308,905.65 and 87,612.30 is: 131,418.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,937.10 : 308,905.65 = 87,612.30 : x
  2. Step 2: Convert to fraction form
    205,937.10/308,905.65 = 87,612.30/x
  3. Step 3: Cross multiply
    205,937.10x = 308,905.65 × 87,612.30
  4. Step 4: Simplify right side
    205,937.10x = 27,063,934,479.50
  5. Step 5: Solve for x
    x = 27,063,934,479.50/205,937.10
  6. Step 6: Final answer
    x = 131,418.45

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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.