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Finding the Fourth Proportional to 161,866.40, 242,799.60 and 105,879.20

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Solution

The fourth proportional to 161,866.40, 242,799.60 and 105,879.20 is: 158,818.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,866.40 : 242,799.60 = 105,879.20 : x
  2. Step 2: Convert to fraction form
    161,866.40/242,799.60 = 105,879.20/x
  3. Step 3: Cross multiply
    161,866.40x = 242,799.60 × 105,879.20
  4. Step 4: Simplify right side
    161,866.40x = 25,707,427,408.32
  5. Step 5: Solve for x
    x = 25,707,427,408.32/161,866.40
  6. Step 6: Final answer
    x = 158,818.80

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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.