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Finding the Fourth Proportional to 118,702.89, 178,081.01 and 39,815.10

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Solution

The fourth proportional to 118,702.89, 178,081.01 and 39,815.10 is: 59,731.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,702.89 : 178,081.01 = 39,815.10 : x
  2. Step 2: Convert to fraction form
    118,702.89/178,081.01 = 39,815.10/x
  3. Step 3: Cross multiply
    118,702.89x = 178,081.01 × 39,815.10
  4. Step 4: Simplify right side
    118,702.89x = 7,090,313,022.18
  5. Step 5: Solve for x
    x = 7,090,313,022.18/118,702.89
  6. Step 6: Final answer
    x = 59,731.60

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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.