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Finding the Fourth Proportional to 273,128.80, 409,693.20 and 161,154.40

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Solution

The fourth proportional to 273,128.80, 409,693.20 and 161,154.40 is: 241,731.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,128.80 : 409,693.20 = 161,154.40 : x
  2. Step 2: Convert to fraction form
    273,128.80/409,693.20 = 161,154.40/x
  3. Step 3: Cross multiply
    273,128.80x = 409,693.20 × 161,154.40
  4. Step 4: Simplify right side
    273,128.80x = 66,023,861,830.08
  5. Step 5: Solve for x
    x = 66,023,861,830.08/273,128.80
  6. Step 6: Final answer
    x = 241,731.60

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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.