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Finding the Fourth Proportional to 199,426.40, 299,139.60 and 143,439.20

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Solution

The fourth proportional to 199,426.40, 299,139.60 and 143,439.20 is: 215,158.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,426.40 : 299,139.60 = 143,439.20 : x
  2. Step 2: Convert to fraction form
    199,426.40/299,139.60 = 143,439.20/x
  3. Step 3: Cross multiply
    199,426.40x = 299,139.60 × 143,439.20
  4. Step 4: Simplify right side
    199,426.40x = 42,908,344,912.32
  5. Step 5: Solve for x
    x = 42,908,344,912.32/199,426.40
  6. Step 6: Final answer
    x = 215,158.80

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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.