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Finding the Fourth Proportional to 640,027.71, 960,042.78 and 166,712.31

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Solution

The fourth proportional to 640,027.71, 960,042.78 and 166,712.31 is: 250,068.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,027.71 : 960,042.78 = 166,712.31 : x
  2. Step 2: Convert to fraction form
    640,027.71/960,042.78 = 166,712.31/x
  3. Step 3: Cross multiply
    640,027.71x = 960,042.78 × 166,712.31
  4. Step 4: Simplify right side
    640,027.71x = 160,050,949,552.62
  5. Step 5: Solve for x
    x = 160,050,949,552.62/640,027.71
  6. Step 6: Final answer
    x = 250,068.78

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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.