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Finding the Fourth Proportional to 254,168.72, 381,203.88 and 85,671.32

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Solution

The fourth proportional to 254,168.72, 381,203.88 and 85,671.32 is: 128,490.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,168.72 : 381,203.88 = 85,671.32 : x
  2. Step 2: Convert to fraction form
    254,168.72/381,203.88 = 85,671.32/x
  3. Step 3: Cross multiply
    254,168.72x = 381,203.88 × 85,671.32
  4. Step 4: Simplify right side
    254,168.72x = 32,658,239,588.72
  5. Step 5: Solve for x
    x = 32,658,239,588.72/254,168.72
  6. Step 6: Final answer
    x = 128,490.40

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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.