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Finding the Fourth Proportional to 109,316.40, 163,945.80 and 34,436.40

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Solution

The fourth proportional to 109,316.40, 163,945.80 and 34,436.40 is: 51,645.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,316.40 : 163,945.80 = 34,436.40 : x
  2. Step 2: Convert to fraction form
    109,316.40/163,945.80 = 34,436.40/x
  3. Step 3: Cross multiply
    109,316.40x = 163,945.80 × 34,436.40
  4. Step 4: Simplify right side
    109,316.40x = 5,645,703,147.12
  5. Step 5: Solve for x
    x = 5,645,703,147.12/109,316.40
  6. Step 6: Final answer
    x = 51,645.53

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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.