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Finding the Fourth Proportional to 156,693.40, 234,942.90 and 90,100.60

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Solution

The fourth proportional to 156,693.40, 234,942.90 and 90,100.60 is: 135,095.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,693.40 : 234,942.90 = 90,100.60 : x
  2. Step 2: Convert to fraction form
    156,693.40/234,942.90 = 90,100.60/x
  3. Step 3: Cross multiply
    156,693.40x = 234,942.90 × 90,100.60
  4. Step 4: Simplify right side
    156,693.40x = 21,168,496,255.74
  5. Step 5: Solve for x
    x = 21,168,496,255.74/156,693.40
  6. Step 6: Final answer
    x = 135,095.01

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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.