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Finding the Fourth Proportional to 206,477.19, 309,712.13 and 56,716.89

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Solution

The fourth proportional to 206,477.19, 309,712.13 and 56,716.89 is: 85,074.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,477.19 : 309,712.13 = 56,716.89 : x
  2. Step 2: Convert to fraction form
    206,477.19/309,712.13 = 56,716.89/x
  3. Step 3: Cross multiply
    206,477.19x = 309,712.13 × 56,716.89
  4. Step 4: Simplify right side
    206,477.19x = 17,565,908,525.29
  5. Step 5: Solve for x
    x = 17,565,908,525.29/206,477.19
  6. Step 6: Final answer
    x = 85,074.33

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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.