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Finding the Fourth Proportional to 254,017.38, 381,076.29 and 85,530.90

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Solution

The fourth proportional to 254,017.38, 381,076.29 and 85,530.90 is: 128,313.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,017.38 : 381,076.29 = 85,530.90 : x
  2. Step 2: Convert to fraction form
    254,017.38/381,076.29 = 85,530.90/x
  3. Step 3: Cross multiply
    254,017.38x = 381,076.29 × 85,530.90
  4. Step 4: Simplify right side
    254,017.38x = 32,593,798,052.36
  5. Step 5: Solve for x
    x = 32,593,798,052.36/254,017.38
  6. Step 6: Final answer
    x = 128,313.26

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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.