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Finding the Fourth Proportional to 55,640.70, 76,742.30 and 38,644.96

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Solution

The fourth proportional to 55,640.70, 76,742.30 and 38,644.96 is: 53,300.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,640.70 : 76,742.30 = 38,644.96 : x
  2. Step 2: Convert to fraction form
    55,640.70/76,742.30 = 38,644.96/x
  3. Step 3: Cross multiply
    55,640.70x = 76,742.30 × 38,644.96
  4. Step 4: Simplify right side
    55,640.70x = 2,965,703,113.81
  5. Step 5: Solve for x
    x = 2,965,703,113.81/55,640.70
  6. Step 6: Final answer
    x = 53,300.97

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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.