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Finding the Fourth Proportional to 135,862.92, 203,861.88 and 90,913.86

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Solution

The fourth proportional to 135,862.92, 203,861.88 and 90,913.86 is: 136,415.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,862.92 : 203,861.88 = 90,913.86 : x
  2. Step 2: Convert to fraction form
    135,862.92/203,861.88 = 90,913.86/x
  3. Step 3: Cross multiply
    135,862.92x = 203,861.88 × 90,913.86
  4. Step 4: Simplify right side
    135,862.92x = 18,533,870,417.66
  5. Step 5: Solve for x
    x = 18,533,870,417.66/135,862.92
  6. Step 6: Final answer
    x = 136,415.96

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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.