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Finding the Fourth Proportional to 210,895.60, 316,409.84 and 92,666.40

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Solution

The fourth proportional to 210,895.60, 316,409.84 and 92,666.40 is: 139,028.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,895.60 : 316,409.84 = 92,666.40 : x
  2. Step 2: Convert to fraction form
    210,895.60/316,409.84 = 92,666.40/x
  3. Step 3: Cross multiply
    210,895.60x = 316,409.84 × 92,666.40
  4. Step 4: Simplify right side
    210,895.60x = 29,320,560,797.38
  5. Step 5: Solve for x
    x = 29,320,560,797.38/210,895.60
  6. Step 6: Final answer
    x = 139,028.79

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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.