Home / 142,749.82-197,001.20-79,087.61

Finding the Fourth Proportional to 142,749.82, 197,001.20 and 79,087.61

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Solution

The fourth proportional to 142,749.82, 197,001.20 and 79,087.61 is: 109,144.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,749.82 : 197,001.20 = 79,087.61 : x
  2. Step 2: Convert to fraction form
    142,749.82/197,001.20 = 79,087.61/x
  3. Step 3: Cross multiply
    142,749.82x = 197,001.20 × 79,087.61
  4. Step 4: Simplify right side
    142,749.82x = 15,580,354,075.13
  5. Step 5: Solve for x
    x = 15,580,354,075.13/142,749.82
  6. Step 6: Final answer
    x = 109,144.47

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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.