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Finding the Fourth Proportional to 118,256.78, 177,290.98 and 68,280.19

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Solution

The fourth proportional to 118,256.78, 177,290.98 and 68,280.19 is: 102,365.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,256.78 : 177,290.98 = 68,280.19 : x
  2. Step 2: Convert to fraction form
    118,256.78/177,290.98 = 68,280.19/x
  3. Step 3: Cross multiply
    118,256.78x = 177,290.98 × 68,280.19
  4. Step 4: Simplify right side
    118,256.78x = 12,105,461,799.69
  5. Step 5: Solve for x
    x = 12,105,461,799.69/118,256.78
  6. Step 6: Final answer
    x = 102,365.90

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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.