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Finding the Fourth Proportional to 104,065.80, 156,098.47 and 80,407.72

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Solution

The fourth proportional to 104,065.80, 156,098.47 and 80,407.72 is: 120,611.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,065.80 : 156,098.47 = 80,407.72 : x
  2. Step 2: Convert to fraction form
    104,065.80/156,098.47 = 80,407.72/x
  3. Step 3: Cross multiply
    104,065.80x = 156,098.47 × 80,407.72
  4. Step 4: Simplify right side
    104,065.80x = 12,551,522,068.19
  5. Step 5: Solve for x
    x = 12,551,522,068.19/104,065.80
  6. Step 6: Final answer
    x = 120,611.40

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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.