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Finding the Fourth Proportional to 111,978.60, 168,006.30 and 49,693.80

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Solution

The fourth proportional to 111,978.60, 168,006.30 and 49,693.80 is: 74,557.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,978.60 : 168,006.30 = 49,693.80 : x
  2. Step 2: Convert to fraction form
    111,978.60/168,006.30 = 49,693.80/x
  3. Step 3: Cross multiply
    111,978.60x = 168,006.30 × 49,693.80
  4. Step 4: Simplify right side
    111,978.60x = 8,348,871,470.94
  5. Step 5: Solve for x
    x = 8,348,871,470.94/111,978.60
  6. Step 6: Final answer
    x = 74,557.74

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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.