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Finding the Fourth Proportional to 213,197.66, 319,446.54 and 72,879.74

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Solution

The fourth proportional to 213,197.66, 319,446.54 and 72,879.74 is: 109,199.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,197.66 : 319,446.54 = 72,879.74 : x
  2. Step 2: Convert to fraction form
    213,197.66/319,446.54 = 72,879.74/x
  3. Step 3: Cross multiply
    213,197.66x = 319,446.54 × 72,879.74
  4. Step 4: Simplify right side
    213,197.66x = 23,281,179,181.87
  5. Step 5: Solve for x
    x = 23,281,179,181.87/213,197.66
  6. Step 6: Final answer
    x = 109,199.98

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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.