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Finding the Fourth Proportional to 68,820, 94,973.04 and 39,012

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Solution

The fourth proportional to 68,820, 94,973.04 and 39,012 is: 53,837.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,820 : 94,973.04 = 39,012 : x
  2. Step 2: Convert to fraction form
    68,820/94,973.04 = 39,012/x
  3. Step 3: Cross multiply
    68,820x = 94,973.04 × 39,012
  4. Step 4: Simplify right side
    68,820x = 3,705,088,236.48
  5. Step 5: Solve for x
    x = 3,705,088,236.48/68,820
  6. Step 6: Final answer
    x = 53,837.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.