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Finding the Fourth Proportional to 118,662.90, 178,021 and 39,775.10

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Solution

The fourth proportional to 118,662.90, 178,021 and 39,775.10 is: 59,671.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,662.90 : 178,021 = 39,775.10 : x
  2. Step 2: Convert to fraction form
    118,662.90/178,021 = 39,775.10/x
  3. Step 3: Cross multiply
    118,662.90x = 178,021 × 39,775.10
  4. Step 4: Simplify right side
    118,662.90x = 7,080,803,077.10
  5. Step 5: Solve for x
    x = 7,080,803,077.10/118,662.90
  6. Step 6: Final answer
    x = 59,671.58

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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.