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Finding the Fourth Proportional to 206,553.70, 310,012.80 and 122,208.40

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Solution

The fourth proportional to 206,553.70, 310,012.80 and 122,208.40 is: 183,420.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,553.70 : 310,012.80 = 122,208.40 : x
  2. Step 2: Convert to fraction form
    206,553.70/310,012.80 = 122,208.40/x
  3. Step 3: Cross multiply
    206,553.70x = 310,012.80 × 122,208.40
  4. Step 4: Simplify right side
    206,553.70x = 37,886,168,267.52
  5. Step 5: Solve for x
    x = 37,886,168,267.52/206,553.70
  6. Step 6: Final answer
    x = 183,420.43

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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.