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Finding the Fourth Proportional to 143,807.74, 198,455.31 and 79,275.60

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Solution

The fourth proportional to 143,807.74, 198,455.31 and 79,275.60 is: 109,400.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,807.74 : 198,455.31 = 79,275.60 : x
  2. Step 2: Convert to fraction form
    143,807.74/198,455.31 = 79,275.60/x
  3. Step 3: Cross multiply
    143,807.74x = 198,455.31 × 79,275.60
  4. Step 4: Simplify right side
    143,807.74x = 15,732,663,773.44
  5. Step 5: Solve for x
    x = 15,732,663,773.44/143,807.74
  6. Step 6: Final answer
    x = 109,400.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.