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Finding the Fourth Proportional to 281,047.96, 387,855.40 and 153,723.56

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Solution

The fourth proportional to 281,047.96, 387,855.40 and 153,723.56 is: 212,143.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,047.96 : 387,855.40 = 153,723.56 : x
  2. Step 2: Convert to fraction form
    281,047.96/387,855.40 = 153,723.56/x
  3. Step 3: Cross multiply
    281,047.96x = 387,855.40 × 153,723.56
  4. Step 4: Simplify right side
    281,047.96x = 59,622,512,853.22
  5. Step 5: Solve for x
    x = 59,622,512,853.22/281,047.96
  6. Step 6: Final answer
    x = 212,143.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.