Home / 142,878.12-197,181.72-79,221.84

Finding the Fourth Proportional to 142,878.12, 197,181.72 and 79,221.84

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Solution

The fourth proportional to 142,878.12, 197,181.72 and 79,221.84 is: 109,331.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,878.12 : 197,181.72 = 79,221.84 : x
  2. Step 2: Convert to fraction form
    142,878.12/197,181.72 = 79,221.84/x
  3. Step 3: Cross multiply
    142,878.12x = 197,181.72 × 79,221.84
  4. Step 4: Simplify right side
    142,878.12x = 15,621,098,672.76
  5. Step 5: Solve for x
    x = 15,621,098,672.76/142,878.12
  6. Step 6: Final answer
    x = 109,331.64

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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.