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Finding the Fourth Proportional to 254,235.30, 381,340.80 and 85,739.10

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Solution

The fourth proportional to 254,235.30, 381,340.80 and 85,739.10 is: 128,604.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,235.30 : 381,340.80 = 85,739.10 : x
  2. Step 2: Convert to fraction form
    254,235.30/381,340.80 = 85,739.10/x
  3. Step 3: Cross multiply
    254,235.30x = 381,340.80 × 85,739.10
  4. Step 4: Simplify right side
    254,235.30x = 32,695,816,985.28
  5. Step 5: Solve for x
    x = 32,695,816,985.28/254,235.30
  6. Step 6: Final answer
    x = 128,604.55

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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.