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Finding the Fourth Proportional to 93,618.20, 140,135.70 and 90,702.20

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Solution

The fourth proportional to 93,618.20, 140,135.70 and 90,702.20 is: 135,770.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,618.20 : 140,135.70 = 90,702.20 : x
  2. Step 2: Convert to fraction form
    93,618.20/140,135.70 = 90,702.20/x
  3. Step 3: Cross multiply
    93,618.20x = 140,135.70 × 90,702.20
  4. Step 4: Simplify right side
    93,618.20x = 12,710,616,288.54
  5. Step 5: Solve for x
    x = 12,710,616,288.54/93,618.20
  6. Step 6: Final answer
    x = 135,770.78

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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.