Home / 99,821.45-149,810.43-69,639.41

Finding the Fourth Proportional to 99,821.45, 149,810.43 and 69,639.41

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Solution

The fourth proportional to 99,821.45, 149,810.43 and 69,639.41 is: 104,513.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,821.45 : 149,810.43 = 69,639.41 : x
  2. Step 2: Convert to fraction form
    99,821.45/149,810.43 = 69,639.41/x
  3. Step 3: Cross multiply
    99,821.45x = 149,810.43 × 69,639.41
  4. Step 4: Simplify right side
    99,821.45x = 10,432,709,957.05
  5. Step 5: Solve for x
    x = 10,432,709,957.05/99,821.45
  6. Step 6: Final answer
    x = 104,513.71

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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.