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Finding the Fourth Proportional to 156,699.60, 235,150.20 and 86,629.20

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Solution

The fourth proportional to 156,699.60, 235,150.20 and 86,629.20 is: 129,999.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,699.60 : 235,150.20 = 86,629.20 : x
  2. Step 2: Convert to fraction form
    156,699.60/235,150.20 = 86,629.20/x
  3. Step 3: Cross multiply
    156,699.60x = 235,150.20 × 86,629.20
  4. Step 4: Simplify right side
    156,699.60x = 20,370,873,705.84
  5. Step 5: Solve for x
    x = 20,370,873,705.84/156,699.60
  6. Step 6: Final answer
    x = 129,999.53

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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.