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Finding the Fourth Proportional to 156,697.40, 234,948.90 and 90,104.60

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Solution

The fourth proportional to 156,697.40, 234,948.90 and 90,104.60 is: 135,101.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,697.40 : 234,948.90 = 90,104.60 : x
  2. Step 2: Convert to fraction form
    156,697.40/234,948.90 = 90,104.60/x
  3. Step 3: Cross multiply
    156,697.40x = 234,948.90 × 90,104.60
  4. Step 4: Simplify right side
    156,697.40x = 21,169,976,654.94
  5. Step 5: Solve for x
    x = 21,169,976,654.94/156,697.40
  6. Step 6: Final answer
    x = 135,101.01

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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.