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Finding the Fourth Proportional to 104,589.60, 156,787.20 and 72,999.60

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Solution

The fourth proportional to 104,589.60, 156,787.20 and 72,999.60 is: 109,431.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,589.60 : 156,787.20 = 72,999.60 : x
  2. Step 2: Convert to fraction form
    104,589.60/156,787.20 = 72,999.60/x
  3. Step 3: Cross multiply
    104,589.60x = 156,787.20 × 72,999.60
  4. Step 4: Simplify right side
    104,589.60x = 11,445,402,885.12
  5. Step 5: Solve for x
    x = 11,445,402,885.12/104,589.60
  6. Step 6: Final answer
    x = 109,431.56

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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.