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Finding the Fourth Proportional to 70,527.80, 105,682.32 and 40,872.08

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Solution

The fourth proportional to 70,527.80, 105,682.32 and 40,872.08 is: 61,244.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,527.80 : 105,682.32 = 40,872.08 : x
  2. Step 2: Convert to fraction form
    70,527.80/105,682.32 = 40,872.08/x
  3. Step 3: Cross multiply
    70,527.80x = 105,682.32 × 40,872.08
  4. Step 4: Simplify right side
    70,527.80x = 4,319,456,237.63
  5. Step 5: Solve for x
    x = 4,319,456,237.63/70,527.80
  6. Step 6: Final answer
    x = 61,244.73

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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.