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Finding the Fourth Proportional to 213,104.82, 319,720.41 and 70,968.45

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Solution

The fourth proportional to 213,104.82, 319,720.41 and 70,968.45 is: 106,473.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,104.82 : 319,720.41 = 70,968.45 : x
  2. Step 2: Convert to fraction form
    213,104.82/319,720.41 = 70,968.45/x
  3. Step 3: Cross multiply
    213,104.82x = 319,720.41 × 70,968.45
  4. Step 4: Simplify right side
    213,104.82x = 22,690,061,931.06
  5. Step 5: Solve for x
    x = 22,690,061,931.06/213,104.82
  6. Step 6: Final answer
    x = 106,473.72

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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.