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Finding the Fourth Proportional to 259,603.70, 389,417.70 and 82,124.60

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Solution

The fourth proportional to 259,603.70, 389,417.70 and 82,124.60 is: 123,190.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,603.70 : 389,417.70 = 82,124.60 : x
  2. Step 2: Convert to fraction form
    259,603.70/389,417.70 = 82,124.60/x
  3. Step 3: Cross multiply
    259,603.70x = 389,417.70 × 82,124.60
  4. Step 4: Simplify right side
    259,603.70x = 31,980,772,845.42
  5. Step 5: Solve for x
    x = 31,980,772,845.42/259,603.70
  6. Step 6: Final answer
    x = 123,190.74

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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.