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Finding the Fourth Proportional to 78,836.57, 108,756.62 and 51,600.67

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Solution

The fourth proportional to 78,836.57, 108,756.62 and 51,600.67 is: 71,184.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,836.57 : 108,756.62 = 51,600.67 : x
  2. Step 2: Convert to fraction form
    78,836.57/108,756.62 = 51,600.67/x
  3. Step 3: Cross multiply
    78,836.57x = 108,756.62 × 51,600.67
  4. Step 4: Simplify right side
    78,836.57x = 5,611,914,718.67
  5. Step 5: Solve for x
    x = 5,611,914,718.67/78,836.57
  6. Step 6: Final answer
    x = 71,184.16

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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.