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Finding the Fourth Proportional to 445,781.35, 668,669.70 and 108,823.78

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Solution

The fourth proportional to 445,781.35, 668,669.70 and 108,823.78 is: 163,235.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,781.35 : 668,669.70 = 108,823.78 : x
  2. Step 2: Convert to fraction form
    445,781.35/668,669.70 = 108,823.78/x
  3. Step 3: Cross multiply
    445,781.35x = 668,669.70 × 108,823.78
  4. Step 4: Simplify right side
    445,781.35x = 72,767,164,325.47
  5. Step 5: Solve for x
    x = 72,767,164,325.47/445,781.35
  6. Step 6: Final answer
    x = 163,235.10

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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.