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Finding the Fourth Proportional to 84,598, 126,899.04 and 28,438.84

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Solution

The fourth proportional to 84,598, 126,899.04 and 28,438.84 is: 42,658.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,598 : 126,899.04 = 28,438.84 : x
  2. Step 2: Convert to fraction form
    84,598/126,899.04 = 28,438.84/x
  3. Step 3: Cross multiply
    84,598x = 126,899.04 × 28,438.84
  4. Step 4: Simplify right side
    84,598x = 3,608,861,494.71
  5. Step 5: Solve for x
    x = 3,608,861,494.71/84,598
  6. Step 6: Final answer
    x = 42,658.95

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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.