Home / 199,631.10-299,446.65-128,772.30

Finding the Fourth Proportional to 199,631.10, 299,446.65 and 128,772.30

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Solution

The fourth proportional to 199,631.10, 299,446.65 and 128,772.30 is: 193,158.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,631.10 : 299,446.65 = 128,772.30 : x
  2. Step 2: Convert to fraction form
    199,631.10/299,446.65 = 128,772.30/x
  3. Step 3: Cross multiply
    199,631.10x = 299,446.65 × 128,772.30
  4. Step 4: Simplify right side
    199,631.10x = 38,560,433,847.80
  5. Step 5: Solve for x
    x = 38,560,433,847.80/199,631.10
  6. Step 6: Final answer
    x = 193,158.45

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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.