Home / 99,816.30-149,724.45-66,428.10

Finding the Fourth Proportional to 99,816.30, 149,724.45 and 66,428.10

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Solution

The fourth proportional to 99,816.30, 149,724.45 and 66,428.10 is: 99,642.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,816.30 : 149,724.45 = 66,428.10 : x
  2. Step 2: Convert to fraction form
    99,816.30/149,724.45 = 66,428.10/x
  3. Step 3: Cross multiply
    99,816.30x = 149,724.45 × 66,428.10
  4. Step 4: Simplify right side
    99,816.30x = 9,945,910,737.05
  5. Step 5: Solve for x
    x = 9,945,910,737.05/99,816.30
  6. Step 6: Final answer
    x = 99,642.15

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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.