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Finding the Fourth Proportional to 211,556.75, 317,364.75 and 61,808.00

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Solution

The fourth proportional to 211,556.75, 317,364.75 and 61,808.00 is: 92,720.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,556.75 : 317,364.75 = 61,808.00 : x
  2. Step 2: Convert to fraction form
    211,556.75/317,364.75 = 61,808.00/x
  3. Step 3: Cross multiply
    211,556.75x = 317,364.75 × 61,808.00
  4. Step 4: Simplify right side
    211,556.75x = 19,615,678,881.18
  5. Step 5: Solve for x
    x = 19,615,678,881.18/211,556.75
  6. Step 6: Final answer
    x = 92,720.65

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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.