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Finding the Fourth Proportional to 206,603.20, 309,904.80 and 58,859.20

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Solution

The fourth proportional to 206,603.20, 309,904.80 and 58,859.20 is: 88,288.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,603.20 : 309,904.80 = 58,859.20 : x
  2. Step 2: Convert to fraction form
    206,603.20/309,904.80 = 58,859.20/x
  3. Step 3: Cross multiply
    206,603.20x = 309,904.80 × 58,859.20
  4. Step 4: Simplify right side
    206,603.20x = 18,240,748,604.16
  5. Step 5: Solve for x
    x = 18,240,748,604.16/206,603.20
  6. Step 6: Final answer
    x = 88,288.80

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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.