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Finding the Fourth Proportional to 137,319, 205,979.76 and 54,213

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Solution

The fourth proportional to 137,319, 205,979.76 and 54,213 is: 81,320.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,319 : 205,979.76 = 54,213 : x
  2. Step 2: Convert to fraction form
    137,319/205,979.76 = 54,213/x
  3. Step 3: Cross multiply
    137,319x = 205,979.76 × 54,213
  4. Step 4: Simplify right side
    137,319x = 11,166,780,728.88
  5. Step 5: Solve for x
    x = 11,166,780,728.88/137,319
  6. Step 6: Final answer
    x = 81,320.00

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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.