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Finding the Fourth Proportional to 104,698.31, 156,987.79 and 71,458.61

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Solution

The fourth proportional to 104,698.31, 156,987.79 and 71,458.61 is: 107,147.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,698.31 : 156,987.79 = 71,458.61 : x
  2. Step 2: Convert to fraction form
    104,698.31/156,987.79 = 71,458.61/x
  3. Step 3: Cross multiply
    104,698.31x = 156,987.79 × 71,458.61
  4. Step 4: Simplify right side
    104,698.31x = 11,218,128,296.79
  5. Step 5: Solve for x
    x = 11,218,128,296.79/104,698.31
  6. Step 6: Final answer
    x = 107,147.18

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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.