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Finding the Fourth Proportional to 156,637.60, 235,029.30 and 81,842.20

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Solution

The fourth proportional to 156,637.60, 235,029.30 and 81,842.20 is: 122,801.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,637.60 : 235,029.30 = 81,842.20 : x
  2. Step 2: Convert to fraction form
    156,637.60/235,029.30 = 81,842.20/x
  3. Step 3: Cross multiply
    156,637.60x = 235,029.30 × 81,842.20
  4. Step 4: Simplify right side
    156,637.60x = 19,235,314,976.46
  5. Step 5: Solve for x
    x = 19,235,314,976.46/156,637.60
  6. Step 6: Final answer
    x = 122,801.39

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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.