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Finding the Fourth Proportional to 107,813.40, 161,720.10 and 99,940.20

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Solution

The fourth proportional to 107,813.40, 161,720.10 and 99,940.20 is: 149,910.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,813.40 : 161,720.10 = 99,940.20 : x
  2. Step 2: Convert to fraction form
    107,813.40/161,720.10 = 99,940.20/x
  3. Step 3: Cross multiply
    107,813.40x = 161,720.10 × 99,940.20
  4. Step 4: Simplify right side
    107,813.40x = 16,162,339,138.02
  5. Step 5: Solve for x
    x = 16,162,339,138.02/107,813.40
  6. Step 6: Final answer
    x = 149,910.30

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1.5x scale

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.