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Finding the Fourth Proportional to 143,807.40, 215,711.10 and 137,246.40

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Solution

The fourth proportional to 143,807.40, 215,711.10 and 137,246.40 is: 205,869.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,807.40 : 215,711.10 = 137,246.40 : x
  2. Step 2: Convert to fraction form
    143,807.40/215,711.10 = 137,246.40/x
  3. Step 3: Cross multiply
    143,807.40x = 215,711.10 × 137,246.40
  4. Step 4: Simplify right side
    143,807.40x = 29,605,571,915.04
  5. Step 5: Solve for x
    x = 29,605,571,915.04/143,807.40
  6. Step 6: Final answer
    x = 205,869.60

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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.