Home / 138,250.02-207,042.83-78,905.78

Finding the Fourth Proportional to 138,250.02, 207,042.83 and 78,905.78

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Solution

The fourth proportional to 138,250.02, 207,042.83 and 78,905.78 is: 118,169.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,250.02 : 207,042.83 = 78,905.78 : x
  2. Step 2: Convert to fraction form
    138,250.02/207,042.83 = 78,905.78/x
  3. Step 3: Cross multiply
    138,250.02x = 207,042.83 × 78,905.78
  4. Step 4: Simplify right side
    138,250.02x = 16,336,874,564.81
  5. Step 5: Solve for x
    x = 16,336,874,564.81/138,250.02
  6. Step 6: Final answer
    x = 118,169.06

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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.