Home / 142,771.40-197,021.59-79,108.64

Finding the Fourth Proportional to 142,771.40, 197,021.59 and 79,108.64

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Solution

The fourth proportional to 142,771.40, 197,021.59 and 79,108.64 is: 109,168.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,771.40 : 197,021.59 = 79,108.64 : x
  2. Step 2: Convert to fraction form
    142,771.40/197,021.59 = 79,108.64/x
  3. Step 3: Cross multiply
    142,771.40x = 197,021.59 × 79,108.64
  4. Step 4: Simplify right side
    142,771.40x = 15,586,108,852.66
  5. Step 5: Solve for x
    x = 15,586,108,852.66/142,771.40
  6. Step 6: Final answer
    x = 109,168.29

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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.