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Finding the Fourth Proportional to 118,664.61, 178,015.40 and 39,760.38

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Solution

The fourth proportional to 118,664.61, 178,015.40 and 39,760.38 is: 59,646.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,664.61 : 178,015.40 = 39,760.38 : x
  2. Step 2: Convert to fraction form
    118,664.61/178,015.40 = 39,760.38/x
  3. Step 3: Cross multiply
    118,664.61x = 178,015.40 × 39,760.38
  4. Step 4: Simplify right side
    118,664.61x = 7,077,959,949.85
  5. Step 5: Solve for x
    x = 7,077,959,949.85/118,664.61
  6. Step 6: Final answer
    x = 59,646.76

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1.5x scale

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.