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Finding the Fourth Proportional to 272,939.30, 409,466.55 and 85,969.70

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Solution

The fourth proportional to 272,939.30, 409,466.55 and 85,969.70 is: 128,972.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,939.30 : 409,466.55 = 85,969.70 : x
  2. Step 2: Convert to fraction form
    272,939.30/409,466.55 = 85,969.70/x
  3. Step 3: Cross multiply
    272,939.30x = 409,466.55 × 85,969.70
  4. Step 4: Simplify right side
    272,939.30x = 35,201,716,463.54
  5. Step 5: Solve for x
    x = 35,201,716,463.54/272,939.30
  6. Step 6: Final answer
    x = 128,972.69

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1.5x scale

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.