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Finding the Fourth Proportional to 118,858.42, 178,068.93 and 74,476.90

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Solution

The fourth proportional to 118,858.42, 178,068.93 and 74,476.90 is: 111,578.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,858.42 : 178,068.93 = 74,476.90 : x
  2. Step 2: Convert to fraction form
    118,858.42/178,068.93 = 74,476.90/x
  3. Step 3: Cross multiply
    118,858.42x = 178,068.93 × 74,476.90
  4. Step 4: Simplify right side
    118,858.42x = 13,262,021,892.72
  5. Step 5: Solve for x
    x = 13,262,021,892.72/118,858.42
  6. Step 6: Final answer
    x = 111,578.31

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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.