Home / 142,778.84-197,031.86-79,115.28

Finding the Fourth Proportional to 142,778.84, 197,031.86 and 79,115.28

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Solution

The fourth proportional to 142,778.84, 197,031.86 and 79,115.28 is: 109,177.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,778.84 : 197,031.86 = 79,115.28 : x
  2. Step 2: Convert to fraction form
    142,778.84/197,031.86 = 79,115.28/x
  3. Step 3: Cross multiply
    142,778.84x = 197,031.86 × 79,115.28
  4. Step 4: Simplify right side
    142,778.84x = 15,588,230,772.82
  5. Step 5: Solve for x
    x = 15,588,230,772.82/142,778.84
  6. Step 6: Final answer
    x = 109,177.46

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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.