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Finding the Fourth Proportional to 109,294.80, 163,909.80 and 42,696.60

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Solution

The fourth proportional to 109,294.80, 163,909.80 and 42,696.60 is: 64,032.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,294.80 : 163,909.80 = 42,696.60 : x
  2. Step 2: Convert to fraction form
    109,294.80/163,909.80 = 42,696.60/x
  3. Step 3: Cross multiply
    109,294.80x = 163,909.80 × 42,696.60
  4. Step 4: Simplify right side
    109,294.80x = 6,998,391,166.68
  5. Step 5: Solve for x
    x = 6,998,391,166.68/109,294.80
  6. Step 6: Final answer
    x = 64,032.24

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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.