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Finding the Fourth Proportional to 156,654.60, 235,054.80 and 81,859.20

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Solution

The fourth proportional to 156,654.60, 235,054.80 and 81,859.20 is: 122,826.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,654.60 : 235,054.80 = 81,859.20 : x
  2. Step 2: Convert to fraction form
    156,654.60/235,054.80 = 81,859.20/x
  3. Step 3: Cross multiply
    156,654.60x = 235,054.80 × 81,859.20
  4. Step 4: Simplify right side
    156,654.60x = 19,241,397,884.16
  5. Step 5: Solve for x
    x = 19,241,397,884.16/156,654.60
  6. Step 6: Final answer
    x = 122,826.89

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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.