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Finding the Fourth Proportional to 273,113.89, 409,670.84 and 86,139.97

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Solution

The fourth proportional to 273,113.89, 409,670.84 and 86,139.97 is: 129,209.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,113.89 : 409,670.84 = 86,139.97 : x
  2. Step 2: Convert to fraction form
    273,113.89/409,670.84 = 86,139.97/x
  3. Step 3: Cross multiply
    273,113.89x = 409,670.84 × 86,139.97
  4. Step 4: Simplify right side
    273,113.89x = 35,289,033,867.47
  5. Step 5: Solve for x
    x = 35,289,033,867.47/273,113.89
  6. Step 6: Final answer
    x = 129,209.96

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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.