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Finding the Fourth Proportional to 64,765.84, 89,380.92 and 39,290.08

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Solution

The fourth proportional to 64,765.84, 89,380.92 and 39,290.08 is: 54,222.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,765.84 : 89,380.92 = 39,290.08 : x
  2. Step 2: Convert to fraction form
    64,765.84/89,380.92 = 39,290.08/x
  3. Step 3: Cross multiply
    64,765.84x = 89,380.92 × 39,290.08
  4. Step 4: Simplify right side
    64,765.84x = 3,511,783,497.27
  5. Step 5: Solve for x
    x = 3,511,783,497.27/64,765.84
  6. Step 6: Final answer
    x = 54,222.77

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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.