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Finding the Fourth Proportional to 104,763.10, 156,971.85 and 89,211.10

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Solution

The fourth proportional to 104,763.10, 156,971.85 and 89,211.10 is: 133,669.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,763.10 : 156,971.85 = 89,211.10 : x
  2. Step 2: Convert to fraction form
    104,763.10/156,971.85 = 89,211.10/x
  3. Step 3: Cross multiply
    104,763.10x = 156,971.85 × 89,211.10
  4. Step 4: Simplify right side
    104,763.10x = 14,003,631,407.54
  5. Step 5: Solve for x
    x = 14,003,631,407.54/104,763.10
  6. Step 6: Final answer
    x = 133,669.50

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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.