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Finding the Fourth Proportional to 104,407.85, 156,501.90 and 66,485.95

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Solution

The fourth proportional to 104,407.85, 156,501.90 and 66,485.95 is: 99,658.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,407.85 : 156,501.90 = 66,485.95 : x
  2. Step 2: Convert to fraction form
    104,407.85/156,501.90 = 66,485.95/x
  3. Step 3: Cross multiply
    104,407.85x = 156,501.90 × 66,485.95
  4. Step 4: Simplify right side
    104,407.85x = 10,405,177,107.05
  5. Step 5: Solve for x
    x = 10,405,177,107.05/104,407.85
  6. Step 6: Final answer
    x = 99,658.95

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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.