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Finding the Fourth Proportional to 127,313.40, 190,990.74 and 43,078.68

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Solution

The fourth proportional to 127,313.40, 190,990.74 and 43,078.68 is: 64,625.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,313.40 : 190,990.74 = 43,078.68 : x
  2. Step 2: Convert to fraction form
    127,313.40/190,990.74 = 43,078.68/x
  3. Step 3: Cross multiply
    127,313.40x = 190,990.74 × 43,078.68
  4. Step 4: Simplify right side
    127,313.40x = 8,227,628,971.42
  5. Step 5: Solve for x
    x = 8,227,628,971.42/127,313.40
  6. Step 6: Final answer
    x = 64,625.00

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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.