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Finding the Fourth Proportional to 109,077.80, 163,616.70 and 108,386.60

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Solution

The fourth proportional to 109,077.80, 163,616.70 and 108,386.60 is: 162,579.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,077.80 : 163,616.70 = 108,386.60 : x
  2. Step 2: Convert to fraction form
    109,077.80/163,616.70 = 108,386.60/x
  3. Step 3: Cross multiply
    109,077.80x = 163,616.70 × 108,386.60
  4. Step 4: Simplify right side
    109,077.80x = 17,733,857,816.22
  5. Step 5: Solve for x
    x = 17,733,857,816.22/109,077.80
  6. Step 6: Final answer
    x = 162,579.90

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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.