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Finding the Fourth Proportional to 82,939.60, 124,409.40 and 20,610.10

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Solution

The fourth proportional to 82,939.60, 124,409.40 and 20,610.10 is: 30,915.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,939.60 : 124,409.40 = 20,610.10 : x
  2. Step 2: Convert to fraction form
    82,939.60/124,409.40 = 20,610.10/x
  3. Step 3: Cross multiply
    82,939.60x = 124,409.40 × 20,610.10
  4. Step 4: Simplify right side
    82,939.60x = 2,564,090,174.94
  5. Step 5: Solve for x
    x = 2,564,090,174.94/82,939.60
  6. Step 6: Final answer
    x = 30,915.15

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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.