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Finding the Fourth Proportional to 211,877.73, 317,749.05 and 69,690.51

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Solution

The fourth proportional to 211,877.73, 317,749.05 and 69,690.51 is: 104,513.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,877.73 : 317,749.05 = 69,690.51 : x
  2. Step 2: Convert to fraction form
    211,877.73/317,749.05 = 69,690.51/x
  3. Step 3: Cross multiply
    211,877.73x = 317,749.05 × 69,690.51
  4. Step 4: Simplify right side
    211,877.73x = 22,144,093,346.52
  5. Step 5: Solve for x
    x = 22,144,093,346.52/211,877.73
  6. Step 6: Final answer
    x = 104,513.55

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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.