Home / 142,395.78-196,498.33-78,729.38

Finding the Fourth Proportional to 142,395.78, 196,498.33 and 78,729.38

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Solution

The fourth proportional to 142,395.78, 196,498.33 and 78,729.38 is: 108,642.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,395.78 : 196,498.33 = 78,729.38 : x
  2. Step 2: Convert to fraction form
    142,395.78/196,498.33 = 78,729.38/x
  3. Step 3: Cross multiply
    142,395.78x = 196,498.33 × 78,729.38
  4. Step 4: Simplify right side
    142,395.78x = 15,470,190,512.62
  5. Step 5: Solve for x
    x = 15,470,190,512.62/142,395.78
  6. Step 6: Final answer
    x = 108,642.20

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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.