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Finding the Fourth Proportional to 57,063.96, 78,769.44 and 42,957.72

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Solution

The fourth proportional to 57,063.96, 78,769.44 and 42,957.72 is: 59,297.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,063.96 : 78,769.44 = 42,957.72 : x
  2. Step 2: Convert to fraction form
    57,063.96/78,769.44 = 42,957.72/x
  3. Step 3: Cross multiply
    57,063.96x = 78,769.44 × 42,957.72
  4. Step 4: Simplify right side
    57,063.96x = 3,383,755,548.08
  5. Step 5: Solve for x
    x = 3,383,755,548.08/57,063.96
  6. Step 6: Final answer
    x = 59,297.59

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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.