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Finding the Fourth Proportional to 118,988.53, 178,425.78 and 69,082.41

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Solution

The fourth proportional to 118,988.53, 178,425.78 and 69,082.41 is: 103,590.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,988.53 : 178,425.78 = 69,082.41 : x
  2. Step 2: Convert to fraction form
    118,988.53/178,425.78 = 69,082.41/x
  3. Step 3: Cross multiply
    118,988.53x = 178,425.78 × 69,082.41
  4. Step 4: Simplify right side
    118,988.53x = 12,326,082,888.53
  5. Step 5: Solve for x
    x = 12,326,082,888.53/118,988.53
  6. Step 6: Final answer
    x = 103,590.51

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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.