Home / 199,631.60-299,447.40-128,772.80

Finding the Fourth Proportional to 199,631.60, 299,447.40 and 128,772.80

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Solution

The fourth proportional to 199,631.60, 299,447.40 and 128,772.80 is: 193,159.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,631.60 : 299,447.40 = 128,772.80 : x
  2. Step 2: Convert to fraction form
    199,631.60/299,447.40 = 128,772.80/x
  3. Step 3: Cross multiply
    199,631.60x = 299,447.40 × 128,772.80
  4. Step 4: Simplify right side
    199,631.60x = 38,560,680,150.72
  5. Step 5: Solve for x
    x = 38,560,680,150.72/199,631.60
  6. Step 6: Final answer
    x = 193,159.20

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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.