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Finding the Fourth Proportional to 142,365.88, 196,469.02 and 78,707.78

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Solution

The fourth proportional to 142,365.88, 196,469.02 and 78,707.78 is: 108,619.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,365.88 : 196,469.02 = 78,707.78 : x
  2. Step 2: Convert to fraction form
    142,365.88/196,469.02 = 78,707.78/x
  3. Step 3: Cross multiply
    142,365.88x = 196,469.02 × 78,707.78
  4. Step 4: Simplify right side
    142,365.88x = 15,463,640,974.16
  5. Step 5: Solve for x
    x = 15,463,640,974.16/142,365.88
  6. Step 6: Final answer
    x = 108,619.01

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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.