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Finding the Fourth Proportional to 117,143.85, 161,658.58 and 63,428.90

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Solution

The fourth proportional to 117,143.85, 161,658.58 and 63,428.90 is: 87,531.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,143.85 : 161,658.58 = 63,428.90 : x
  2. Step 2: Convert to fraction form
    117,143.85/161,658.58 = 63,428.90/x
  3. Step 3: Cross multiply
    117,143.85x = 161,658.58 × 63,428.90
  4. Step 4: Simplify right side
    117,143.85x = 10,253,825,904.96
  5. Step 5: Solve for x
    x = 10,253,825,904.96/117,143.85
  6. Step 6: Final answer
    x = 87,531.92

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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.