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Finding the Fourth Proportional to 206,728.20, 310,092.30 and 127,931.40

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Solution

The fourth proportional to 206,728.20, 310,092.30 and 127,931.40 is: 191,897.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,728.20 : 310,092.30 = 127,931.40 : x
  2. Step 2: Convert to fraction form
    206,728.20/310,092.30 = 127,931.40/x
  3. Step 3: Cross multiply
    206,728.20x = 310,092.30 × 127,931.40
  4. Step 4: Simplify right side
    206,728.20x = 39,670,542,068.22
  5. Step 5: Solve for x
    x = 39,670,542,068.22/206,728.20
  6. Step 6: Final answer
    x = 191,897.10

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.