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Finding the Fourth Proportional to 118,830.60, 178,272.90 and 39,952.80

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Solution

The fourth proportional to 118,830.60, 178,272.90 and 39,952.80 is: 59,938.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,830.60 : 178,272.90 = 39,952.80 : x
  2. Step 2: Convert to fraction form
    118,830.60/178,272.90 = 39,952.80/x
  3. Step 3: Cross multiply
    118,830.60x = 178,272.90 × 39,952.80
  4. Step 4: Simplify right side
    118,830.60x = 7,122,501,519.12
  5. Step 5: Solve for x
    x = 7,122,501,519.12/118,830.60
  6. Step 6: Final answer
    x = 59,938.28

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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.