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Finding the Fourth Proportional to 212,699.82, 319,055.91 and 79,554.67

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Solution

The fourth proportional to 212,699.82, 319,055.91 and 79,554.67 is: 119,334.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,699.82 : 319,055.91 = 79,554.67 : x
  2. Step 2: Convert to fraction form
    212,699.82/319,055.91 = 79,554.67/x
  3. Step 3: Cross multiply
    212,699.82x = 319,055.91 × 79,554.67
  4. Step 4: Simplify right side
    212,699.82x = 25,382,387,631.60
  5. Step 5: Solve for x
    x = 25,382,387,631.60/212,699.82
  6. Step 6: Final answer
    x = 119,334.32

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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.