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Finding the Fourth Proportional to 104,063.79, 156,095.48 and 80,405.72

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Solution

The fourth proportional to 104,063.79, 156,095.48 and 80,405.72 is: 120,608.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,063.79 : 156,095.48 = 80,405.72 : x
  2. Step 2: Convert to fraction form
    104,063.79/156,095.48 = 80,405.72/x
  3. Step 3: Cross multiply
    104,063.79x = 156,095.48 × 80,405.72
  4. Step 4: Simplify right side
    104,063.79x = 12,550,968,677.67
  5. Step 5: Solve for x
    x = 12,550,968,677.67/104,063.79
  6. Step 6: Final answer
    x = 120,608.41

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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.