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Finding the Fourth Proportional to 118,981.73, 178,415.19 and 69,074.39

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Solution

The fourth proportional to 118,981.73, 178,415.19 and 69,074.39 is: 103,578.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,981.73 : 178,415.19 = 69,074.39 : x
  2. Step 2: Convert to fraction form
    118,981.73/178,415.19 = 69,074.39/x
  3. Step 3: Cross multiply
    118,981.73x = 178,415.19 × 69,074.39
  4. Step 4: Simplify right side
    118,981.73x = 12,323,920,070.61
  5. Step 5: Solve for x
    x = 12,323,920,070.61/118,981.73
  6. Step 6: Final answer
    x = 103,578.26

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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.