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Finding the Fourth Proportional to 108,820.40, 163,036.20 and 88,991.60

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Solution

The fourth proportional to 108,820.40, 163,036.20 and 88,991.60 is: 133,328.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,820.40 : 163,036.20 = 88,991.60 : x
  2. Step 2: Convert to fraction form
    108,820.40/163,036.20 = 88,991.60/x
  3. Step 3: Cross multiply
    108,820.40x = 163,036.20 × 88,991.60
  4. Step 4: Simplify right side
    108,820.40x = 14,508,852,295.92
  5. Step 5: Solve for x
    x = 14,508,852,295.92/108,820.40
  6. Step 6: Final answer
    x = 133,328.42

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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.