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Finding the Fourth Proportional to 108,838.80, 163,085.40 and 80,845.20

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Solution

The fourth proportional to 108,838.80, 163,085.40 and 80,845.20 is: 121,139.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,838.80 : 163,085.40 = 80,845.20 : x
  2. Step 2: Convert to fraction form
    108,838.80/163,085.40 = 80,845.20/x
  3. Step 3: Cross multiply
    108,838.80x = 163,085.40 × 80,845.20
  4. Step 4: Simplify right side
    108,838.80x = 13,184,671,780.08
  5. Step 5: Solve for x
    x = 13,184,671,780.08/108,838.80
  6. Step 6: Final answer
    x = 121,139.44

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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.