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Finding the Fourth Proportional to 82,607.50, 123,913.68 and 20,278

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Solution

The fourth proportional to 82,607.50, 123,913.68 and 20,278 is: 30,417.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,607.50 : 123,913.68 = 20,278 : x
  2. Step 2: Convert to fraction form
    82,607.50/123,913.68 = 20,278/x
  3. Step 3: Cross multiply
    82,607.50x = 123,913.68 × 20,278
  4. Step 4: Simplify right side
    82,607.50x = 2,512,721,603.04
  5. Step 5: Solve for x
    x = 2,512,721,603.04/82,607.50
  6. Step 6: Final answer
    x = 30,417.60

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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.