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Finding the Fourth Proportional to 91,311.51, 126,048.70 and 55,512.96

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Solution

The fourth proportional to 91,311.51, 126,048.70 and 55,512.96 is: 76,631.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,311.51 : 126,048.70 = 55,512.96 : x
  2. Step 2: Convert to fraction form
    91,311.51/126,048.70 = 55,512.96/x
  3. Step 3: Cross multiply
    91,311.51x = 126,048.70 × 55,512.96
  4. Step 4: Simplify right side
    91,311.51x = 6,997,336,441.15
  5. Step 5: Solve for x
    x = 6,997,336,441.15/91,311.51
  6. Step 6: Final answer
    x = 76,631.48

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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.