Home / 142,626.48-196,831.80-78,971.28

Finding the Fourth Proportional to 142,626.48, 196,831.80 and 78,971.28

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Solution

The fourth proportional to 142,626.48, 196,831.80 and 78,971.28 is: 108,984.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,626.48 : 196,831.80 = 78,971.28 : x
  2. Step 2: Convert to fraction form
    142,626.48/196,831.80 = 78,971.28/x
  3. Step 3: Cross multiply
    142,626.48x = 196,831.80 × 78,971.28
  4. Step 4: Simplify right side
    142,626.48x = 15,544,059,190.70
  5. Step 5: Solve for x
    x = 15,544,059,190.70/142,626.48
  6. Step 6: Final answer
    x = 108,984.38

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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.