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Finding the Fourth Proportional to 104,361.55, 156,261.85 and 85,864.80

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Solution

The fourth proportional to 104,361.55, 156,261.85 and 85,864.80 is: 128,566.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,361.55 : 156,261.85 = 85,864.80 : x
  2. Step 2: Convert to fraction form
    104,361.55/156,261.85 = 85,864.80/x
  3. Step 3: Cross multiply
    104,361.55x = 156,261.85 × 85,864.80
  4. Step 4: Simplify right side
    104,361.55x = 13,417,392,497.88
  5. Step 5: Solve for x
    x = 13,417,392,497.88/104,361.55
  6. Step 6: Final answer
    x = 128,566.44

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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.