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Finding the Fourth Proportional to 163,640.80, 245,518.80 and 80,479.20

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Solution

The fourth proportional to 163,640.80, 245,518.80 and 80,479.20 is: 120,747.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,640.80 : 245,518.80 = 80,479.20 : x
  2. Step 2: Convert to fraction form
    163,640.80/245,518.80 = 80,479.20/x
  3. Step 3: Cross multiply
    163,640.80x = 245,518.80 × 80,479.20
  4. Step 4: Simplify right side
    163,640.80x = 19,759,156,608.96
  5. Step 5: Solve for x
    x = 19,759,156,608.96/163,640.80
  6. Step 6: Final answer
    x = 120,747.13

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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.