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Finding the Fourth Proportional to 51,264, 70,744.32 and 28,909.44

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Solution

The fourth proportional to 51,264, 70,744.32 and 28,909.44 is: 39,895.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,264 : 70,744.32 = 28,909.44 : x
  2. Step 2: Convert to fraction form
    51,264/70,744.32 = 28,909.44/x
  3. Step 3: Cross multiply
    51,264x = 70,744.32 × 28,909.44
  4. Step 4: Simplify right side
    51,264x = 2,045,178,674.38
  5. Step 5: Solve for x
    x = 2,045,178,674.38/51,264
  6. Step 6: Final answer
    x = 39,895.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.