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Finding the Fourth Proportional to 109,970.60, 164,939.70 and 31,092.80

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Solution

The fourth proportional to 109,970.60, 164,939.70 and 31,092.80 is: 46,634.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,970.60 : 164,939.70 = 31,092.80 : x
  2. Step 2: Convert to fraction form
    109,970.60/164,939.70 = 31,092.80/x
  3. Step 3: Cross multiply
    109,970.60x = 164,939.70 × 31,092.80
  4. Step 4: Simplify right side
    109,970.60x = 5,128,437,104.16
  5. Step 5: Solve for x
    x = 5,128,437,104.16/109,970.60
  6. Step 6: Final answer
    x = 46,634.62

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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.