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Finding the Fourth Proportional to 66,384.96, 99,529.56 and 31,290

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Solution

The fourth proportional to 66,384.96, 99,529.56 and 31,290 is: 46,912.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,384.96 : 99,529.56 = 31,290 : x
  2. Step 2: Convert to fraction form
    66,384.96/99,529.56 = 31,290/x
  3. Step 3: Cross multiply
    66,384.96x = 99,529.56 × 31,290
  4. Step 4: Simplify right side
    66,384.96x = 3,114,279,932.40
  5. Step 5: Solve for x
    x = 3,114,279,932.40/66,384.96
  6. Step 6: Final answer
    x = 46,912.43

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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.