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Finding the Fourth Proportional to 138,885.78, 207,114.69 and 123,576.78

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Solution

The fourth proportional to 138,885.78, 207,114.69 and 123,576.78 is: 184,285.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,885.78 : 207,114.69 = 123,576.78 : x
  2. Step 2: Convert to fraction form
    138,885.78/207,114.69 = 123,576.78/x
  3. Step 3: Cross multiply
    138,885.78x = 207,114.69 × 123,576.78
  4. Step 4: Simplify right side
    138,885.78x = 25,594,566,480.90
  5. Step 5: Solve for x
    x = 25,594,566,480.90/138,885.78
  6. Step 6: Final answer
    x = 184,285.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.