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Finding the Fourth Proportional to 104,085.80, 156,128.70 and 102,530.60

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Solution

The fourth proportional to 104,085.80, 156,128.70 and 102,530.60 is: 153,795.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,085.80 : 156,128.70 = 102,530.60 : x
  2. Step 2: Convert to fraction form
    104,085.80/156,128.70 = 102,530.60/x
  3. Step 3: Cross multiply
    104,085.80x = 156,128.70 × 102,530.60
  4. Step 4: Simplify right side
    104,085.80x = 16,007,969,288.22
  5. Step 5: Solve for x
    x = 16,007,969,288.22/104,085.80
  6. Step 6: Final answer
    x = 153,795.90

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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.