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Finding the Fourth Proportional to 99,819.45, 149,807.43 and 69,637.41

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Solution

The fourth proportional to 99,819.45, 149,807.43 and 69,637.41 is: 104,510.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,819.45 : 149,807.43 = 69,637.41 : x
  2. Step 2: Convert to fraction form
    99,819.45/149,807.43 = 69,637.41/x
  3. Step 3: Cross multiply
    99,819.45x = 149,807.43 × 69,637.41
  4. Step 4: Simplify right side
    99,819.45x = 10,432,201,423.96
  5. Step 5: Solve for x
    x = 10,432,201,423.96/99,819.45
  6. Step 6: Final answer
    x = 104,510.71

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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.