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Finding the Fourth Proportional to 213,058.74, 319,577.73 and 79,928.63

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Solution

The fourth proportional to 213,058.74, 319,577.73 and 79,928.63 is: 119,889.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,058.74 : 319,577.73 = 79,928.63 : x
  2. Step 2: Convert to fraction form
    213,058.74/319,577.73 = 79,928.63/x
  3. Step 3: Cross multiply
    213,058.74x = 319,577.73 × 79,928.63
  4. Step 4: Simplify right side
    213,058.74x = 25,543,408,539.52
  5. Step 5: Solve for x
    x = 25,543,408,539.52/213,058.74
  6. Step 6: Final answer
    x = 119,889.04

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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.