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Finding the Fourth Proportional to 64,872.77, 89,527.07 and 40,990.73

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Solution

The fourth proportional to 64,872.77, 89,527.07 and 40,990.73 is: 56,568.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,872.77 : 89,527.07 = 40,990.73 : x
  2. Step 2: Convert to fraction form
    64,872.77/89,527.07 = 40,990.73/x
  3. Step 3: Cross multiply
    64,872.77x = 89,527.07 × 40,990.73
  4. Step 4: Simplify right side
    64,872.77x = 3,669,779,608.90
  5. Step 5: Solve for x
    x = 3,669,779,608.90/64,872.77
  6. Step 6: Final answer
    x = 56,568.88

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1.5x scale

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.