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Finding the Fourth Proportional to 118,605.20, 177,907.80 and 39,711.20

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Solution

The fourth proportional to 118,605.20, 177,907.80 and 39,711.20 is: 59,566.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,605.20 : 177,907.80 = 39,711.20 : x
  2. Step 2: Convert to fraction form
    118,605.20/177,907.80 = 39,711.20/x
  3. Step 3: Cross multiply
    118,605.20x = 177,907.80 × 39,711.20
  4. Step 4: Simplify right side
    118,605.20x = 7,064,932,227.36
  5. Step 5: Solve for x
    x = 7,064,932,227.36/118,605.20
  6. Step 6: Final answer
    x = 59,566.80

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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.