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Finding the Fourth Proportional to 118,978.11, 178,483.64 and 40,114.89

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Solution

The fourth proportional to 118,978.11, 178,483.64 and 40,114.89 is: 60,177.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,978.11 : 178,483.64 = 40,114.89 : x
  2. Step 2: Convert to fraction form
    118,978.11/178,483.64 = 40,114.89/x
  3. Step 3: Cross multiply
    118,978.11x = 178,483.64 × 40,114.89
  4. Step 4: Simplify right side
    118,978.11x = 7,159,851,585.40
  5. Step 5: Solve for x
    x = 7,159,851,585.40/118,978.11
  6. Step 6: Final answer
    x = 60,177.89

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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.