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Finding the Fourth Proportional to 272,873.44, 409,290.18 and 85,938.40

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Solution

The fourth proportional to 272,873.44, 409,290.18 and 85,938.40 is: 128,901.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,873.44 : 409,290.18 = 85,938.40 : x
  2. Step 2: Convert to fraction form
    272,873.44/409,290.18 = 85,938.40/x
  3. Step 3: Cross multiply
    272,873.44x = 409,290.18 × 85,938.40
  4. Step 4: Simplify right side
    272,873.44x = 35,173,743,204.91
  5. Step 5: Solve for x
    x = 35,173,743,204.91/272,873.44
  6. Step 6: Final answer
    x = 128,901.31

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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.