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Finding the Fourth Proportional to 213,085.47, 319,544.68 and 79,893.12

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Solution

The fourth proportional to 213,085.47, 319,544.68 and 79,893.12 is: 119,808.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,085.47 : 319,544.68 = 79,893.12 : x
  2. Step 2: Convert to fraction form
    213,085.47/319,544.68 = 79,893.12/x
  3. Step 3: Cross multiply
    213,085.47x = 319,544.68 × 79,893.12
  4. Step 4: Simplify right side
    213,085.47x = 25,529,421,464.60
  5. Step 5: Solve for x
    x = 25,529,421,464.60/213,085.47
  6. Step 6: Final answer
    x = 119,808.36

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1.5x scale

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.