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Finding the Fourth Proportional to 117,945.60, 176,918.40 and 71,174.40

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Solution

The fourth proportional to 117,945.60, 176,918.40 and 71,174.40 is: 106,761.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,945.60 : 176,918.40 = 71,174.40 : x
  2. Step 2: Convert to fraction form
    117,945.60/176,918.40 = 71,174.40/x
  3. Step 3: Cross multiply
    117,945.60x = 176,918.40 × 71,174.40
  4. Step 4: Simplify right side
    117,945.60x = 12,592,060,968.96
  5. Step 5: Solve for x
    x = 12,592,060,968.96/117,945.60
  6. Step 6: Final answer
    x = 106,761.60

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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.