Home / 142,729.77-196,979.07-79,073.49

Finding the Fourth Proportional to 142,729.77, 196,979.07 and 79,073.49

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Solution

The fourth proportional to 142,729.77, 196,979.07 and 79,073.49 is: 109,128.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,729.77 : 196,979.07 = 79,073.49 : x
  2. Step 2: Convert to fraction form
    142,729.77/196,979.07 = 79,073.49/x
  3. Step 3: Cross multiply
    142,729.77x = 196,979.07 × 79,073.49
  4. Step 4: Simplify right side
    142,729.77x = 15,575,822,521.85
  5. Step 5: Solve for x
    x = 15,575,822,521.85/142,729.77
  6. Step 6: Final answer
    x = 109,128.06

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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.