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Finding the Fourth Proportional to 208,812.62, 288,158.36 and 122,781.30

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Solution

The fourth proportional to 208,812.62, 288,158.36 and 122,781.30 is: 169,436.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,812.62 : 288,158.36 = 122,781.30 : x
  2. Step 2: Convert to fraction form
    208,812.62/288,158.36 = 122,781.30/x
  3. Step 3: Cross multiply
    208,812.62x = 288,158.36 × 122,781.30
  4. Step 4: Simplify right side
    208,812.62x = 35,380,457,432.76
  5. Step 5: Solve for x
    x = 35,380,457,432.76/208,812.62
  6. Step 6: Final answer
    x = 169,436.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.