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Finding the Fourth Proportional to 127,640.40, 191,460.60 and 74,277.60

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Solution

The fourth proportional to 127,640.40, 191,460.60 and 74,277.60 is: 111,416.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,640.40 : 191,460.60 = 74,277.60 : x
  2. Step 2: Convert to fraction form
    127,640.40/191,460.60 = 74,277.60/x
  3. Step 3: Cross multiply
    127,640.40x = 191,460.60 × 74,277.60
  4. Step 4: Simplify right side
    127,640.40x = 14,221,233,862.56
  5. Step 5: Solve for x
    x = 14,221,233,862.56/127,640.40
  6. Step 6: Final answer
    x = 111,416.40

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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.