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Finding the Fourth Proportional to 91,512, 126,221.35 and 55,704.30

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Solution

The fourth proportional to 91,512, 126,221.35 and 55,704.30 is: 76,832.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,512 : 126,221.35 = 55,704.30 : x
  2. Step 2: Convert to fraction form
    91,512/126,221.35 = 55,704.30/x
  3. Step 3: Cross multiply
    91,512x = 126,221.35 × 55,704.30
  4. Step 4: Simplify right side
    91,512x = 7,031,071,946.81
  5. Step 5: Solve for x
    x = 7,031,071,946.81/91,512
  6. Step 6: Final answer
    x = 76,832.24

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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.