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Finding the Fourth Proportional to 212,707.62, 319,185.46 and 79,681.32

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Solution

The fourth proportional to 212,707.62, 319,185.46 and 79,681.32 is: 119,568.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,707.62 : 319,185.46 = 79,681.32 : x
  2. Step 2: Convert to fraction form
    212,707.62/319,185.46 = 79,681.32/x
  3. Step 3: Cross multiply
    212,707.62x = 319,185.46 × 79,681.32
  4. Step 4: Simplify right side
    212,707.62x = 25,433,118,877.21
  5. Step 5: Solve for x
    x = 25,433,118,877.21/212,707.62
  6. Step 6: Final answer
    x = 119,568.44

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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.