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Finding the Fourth Proportional to 199,422.40, 299,133.60 and 143,435.20

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Solution

The fourth proportional to 199,422.40, 299,133.60 and 143,435.20 is: 215,152.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,422.40 : 299,133.60 = 143,435.20 : x
  2. Step 2: Convert to fraction form
    199,422.40/299,133.60 = 143,435.20/x
  3. Step 3: Cross multiply
    199,422.40x = 299,133.60 × 143,435.20
  4. Step 4: Simplify right side
    199,422.40x = 42,906,287,742.72
  5. Step 5: Solve for x
    x = 42,906,287,742.72/199,422.40
  6. Step 6: Final answer
    x = 215,152.80

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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.