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Finding the Fourth Proportional to 127,622, 191,453.76 and 43,389.72

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Solution

The fourth proportional to 127,622, 191,453.76 and 43,389.72 is: 65,091.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,622 : 191,453.76 = 43,389.72 : x
  2. Step 2: Convert to fraction form
    127,622/191,453.76 = 43,389.72/x
  3. Step 3: Cross multiply
    127,622x = 191,453.76 × 43,389.72
  4. Step 4: Simplify right side
    127,622x = 8,307,125,039.35
  5. Step 5: Solve for x
    x = 8,307,125,039.35/127,622
  6. Step 6: Final answer
    x = 65,091.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.