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Finding the Fourth Proportional to 104,005.80, 156,008.70 and 74,359.80

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Solution

The fourth proportional to 104,005.80, 156,008.70 and 74,359.80 is: 111,539.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,005.80 : 156,008.70 = 74,359.80 : x
  2. Step 2: Convert to fraction form
    104,005.80/156,008.70 = 74,359.80/x
  3. Step 3: Cross multiply
    104,005.80x = 156,008.70 × 74,359.80
  4. Step 4: Simplify right side
    104,005.80x = 11,600,775,730.26
  5. Step 5: Solve for x
    x = 11,600,775,730.26/104,005.80
  6. Step 6: Final answer
    x = 111,539.70

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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.