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Finding the Fourth Proportional to 117,898.68, 162,721.32 and 75,455.76

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Solution

The fourth proportional to 117,898.68, 162,721.32 and 75,455.76 is: 104,142.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,898.68 : 162,721.32 = 75,455.76 : x
  2. Step 2: Convert to fraction form
    117,898.68/162,721.32 = 75,455.76/x
  3. Step 3: Cross multiply
    117,898.68x = 162,721.32 × 75,455.76
  4. Step 4: Simplify right side
    117,898.68x = 12,278,260,868.80
  5. Step 5: Solve for x
    x = 12,278,260,868.80/117,898.68
  6. Step 6: Final answer
    x = 104,142.48

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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.