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Finding the Fourth Proportional to 118,838.77, 178,138.19 and 74,496.67

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Solution

The fourth proportional to 118,838.77, 178,138.19 and 74,496.67 is: 111,669.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,838.77 : 178,138.19 = 74,496.67 : x
  2. Step 2: Convert to fraction form
    118,838.77/178,138.19 = 74,496.67/x
  3. Step 3: Cross multiply
    118,838.77x = 178,138.19 × 74,496.67
  4. Step 4: Simplify right side
    118,838.77x = 13,270,701,695.72
  5. Step 5: Solve for x
    x = 13,270,701,695.72/118,838.77
  6. Step 6: Final answer
    x = 111,669.80

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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.