Home / 84,678.42-126,972.20-28,499.88

Finding the Fourth Proportional to 84,678.42, 126,972.20 and 28,499.88

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Solution

The fourth proportional to 84,678.42, 126,972.20 and 28,499.88 is: 42,734.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,678.42 : 126,972.20 = 28,499.88 : x
  2. Step 2: Convert to fraction form
    84,678.42/126,972.20 = 28,499.88/x
  3. Step 3: Cross multiply
    84,678.42x = 126,972.20 × 28,499.88
  4. Step 4: Simplify right side
    84,678.42x = 3,618,692,463.34
  5. Step 5: Solve for x
    x = 3,618,692,463.34/84,678.42
  6. Step 6: Final answer
    x = 42,734.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.