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Finding the Fourth Proportional to 208,818.81, 313,276.82 and 90,502.11

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Solution

The fourth proportional to 208,818.81, 313,276.82 and 90,502.11 is: 135,774.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,818.81 : 313,276.82 = 90,502.11 : x
  2. Step 2: Convert to fraction form
    208,818.81/313,276.82 = 90,502.11/x
  3. Step 3: Cross multiply
    208,818.81x = 313,276.82 × 90,502.11
  4. Step 4: Simplify right side
    208,818.81x = 28,352,212,771.58
  5. Step 5: Solve for x
    x = 28,352,212,771.58/208,818.81
  6. Step 6: Final answer
    x = 135,774.23

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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.