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Finding the Fourth Proportional to 79,168.76, 118,738.27 and 39,715.28

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Solution

The fourth proportional to 79,168.76, 118,738.27 and 39,715.28 is: 59,565.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,168.76 : 118,738.27 = 39,715.28 : x
  2. Step 2: Convert to fraction form
    79,168.76/118,738.27 = 39,715.28/x
  3. Step 3: Cross multiply
    79,168.76x = 118,738.27 × 39,715.28
  4. Step 4: Simplify right side
    79,168.76x = 4,715,723,639.77
  5. Step 5: Solve for x
    x = 4,715,723,639.77/79,168.76
  6. Step 6: Final answer
    x = 59,565.46

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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.