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Finding the Fourth Proportional to 143,609.80, 215,414.70 and 113,866.60

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Solution

The fourth proportional to 143,609.80, 215,414.70 and 113,866.60 is: 170,799.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,609.80 : 215,414.70 = 113,866.60 : x
  2. Step 2: Convert to fraction form
    143,609.80/215,414.70 = 113,866.60/x
  3. Step 3: Cross multiply
    143,609.80x = 215,414.70 × 113,866.60
  4. Step 4: Simplify right side
    143,609.80x = 24,528,539,479.02
  5. Step 5: Solve for x
    x = 24,528,539,479.02/143,609.80
  6. Step 6: Final answer
    x = 170,799.90

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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.