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Finding the Fourth Proportional to 103,640.70, 155,461.05 and 95,475.90

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Solution

The fourth proportional to 103,640.70, 155,461.05 and 95,475.90 is: 143,213.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,640.70 : 155,461.05 = 95,475.90 : x
  2. Step 2: Convert to fraction form
    103,640.70/155,461.05 = 95,475.90/x
  3. Step 3: Cross multiply
    103,640.70x = 155,461.05 × 95,475.90
  4. Step 4: Simplify right side
    103,640.70x = 14,842,783,663.70
  5. Step 5: Solve for x
    x = 14,842,783,663.70/103,640.70
  6. Step 6: Final answer
    x = 143,213.85

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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.