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Finding the Fourth Proportional to 254,168.77, 380,987.13 and 85,630.85

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Solution

The fourth proportional to 254,168.77, 380,987.13 and 85,630.85 is: 128,356.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,168.77 : 380,987.13 = 85,630.85 : x
  2. Step 2: Convert to fraction form
    254,168.77/380,987.13 = 85,630.85/x
  3. Step 3: Cross multiply
    254,168.77x = 380,987.13 × 85,630.85
  4. Step 4: Simplify right side
    254,168.77x = 32,624,251,780.96
  5. Step 5: Solve for x
    x = 32,624,251,780.96/254,168.77
  6. Step 6: Final answer
    x = 128,356.65

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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.