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Finding the Fourth Proportional to 213,089.52, 319,551.16 and 79,897.20

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Solution

The fourth proportional to 213,089.52, 319,551.16 and 79,897.20 is: 119,814.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,089.52 : 319,551.16 = 79,897.20 : x
  2. Step 2: Convert to fraction form
    213,089.52/319,551.16 = 79,897.20/x
  3. Step 3: Cross multiply
    213,089.52x = 319,551.16 × 79,897.20
  4. Step 4: Simplify right side
    213,089.52x = 25,531,242,940.75
  5. Step 5: Solve for x
    x = 25,531,242,940.75/213,089.52
  6. Step 6: Final answer
    x = 119,814.63

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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.