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Finding the Fourth Proportional to 273,119.64, 409,679.46 and 86,145.72

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Solution

The fourth proportional to 273,119.64, 409,679.46 and 86,145.72 is: 129,218.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,119.64 : 409,679.46 = 86,145.72 : x
  2. Step 2: Convert to fraction form
    273,119.64/409,679.46 = 86,145.72/x
  3. Step 3: Cross multiply
    273,119.64x = 409,679.46 × 86,145.72
  4. Step 4: Simplify right side
    273,119.64x = 35,292,132,050.91
  5. Step 5: Solve for x
    x = 35,292,132,050.91/273,119.64
  6. Step 6: Final answer
    x = 129,218.58

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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.