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Finding the Fourth Proportional to 118,287.60, 177,431.40 and 71,631.60

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Solution

The fourth proportional to 118,287.60, 177,431.40 and 71,631.60 is: 107,447.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,287.60 : 177,431.40 = 71,631.60 : x
  2. Step 2: Convert to fraction form
    118,287.60/177,431.40 = 71,631.60/x
  3. Step 3: Cross multiply
    118,287.60x = 177,431.40 × 71,631.60
  4. Step 4: Simplify right side
    118,287.60x = 12,709,695,072.24
  5. Step 5: Solve for x
    x = 12,709,695,072.24/118,287.60
  6. Step 6: Final answer
    x = 107,447.40

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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.