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Finding the Fourth Proportional to 211,503.51, 317,196.95 and 91,600.83

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Solution

The fourth proportional to 211,503.51, 317,196.95 and 91,600.83 is: 137,375.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,503.51 : 317,196.95 = 91,600.83 : x
  2. Step 2: Convert to fraction form
    211,503.51/317,196.95 = 91,600.83/x
  3. Step 3: Cross multiply
    211,503.51x = 317,196.95 × 91,600.83
  4. Step 4: Simplify right side
    211,503.51x = 29,055,503,435.46
  5. Step 5: Solve for x
    x = 29,055,503,435.46/211,503.51
  6. Step 6: Final answer
    x = 137,375.99

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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.