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Finding the Fourth Proportional to 213,090.77, 319,553.06 and 79,898.45

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Solution

The fourth proportional to 213,090.77, 319,553.06 and 79,898.45 is: 119,816.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,090.77 : 319,553.06 = 79,898.45 : x
  2. Step 2: Convert to fraction form
    213,090.77/319,553.06 = 79,898.45/x
  3. Step 3: Cross multiply
    213,090.77x = 319,553.06 × 79,898.45
  4. Step 4: Simplify right side
    213,090.77x = 25,531,793,787.26
  5. Step 5: Solve for x
    x = 25,531,793,787.26/213,090.77
  6. Step 6: Final answer
    x = 119,816.52

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1.5x scale

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.