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Finding the Fourth Proportional to 118,827.98, 178,121.95 and 74,485.85

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Solution

The fourth proportional to 118,827.98, 178,121.95 and 74,485.85 is: 111,653.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,827.98 : 178,121.95 = 74,485.85 : x
  2. Step 2: Convert to fraction form
    118,827.98/178,121.95 = 74,485.85/x
  3. Step 3: Cross multiply
    118,827.98x = 178,121.95 × 74,485.85
  4. Step 4: Simplify right side
    118,827.98x = 13,267,563,772.58
  5. Step 5: Solve for x
    x = 13,267,563,772.58/118,827.98
  6. Step 6: Final answer
    x = 111,653.53

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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.