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Finding the Fourth Proportional to 68,786, 94,924.72 and 40,509.12

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Solution

The fourth proportional to 68,786, 94,924.72 and 40,509.12 is: 55,902.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,786 : 94,924.72 = 40,509.12 : x
  2. Step 2: Convert to fraction form
    68,786/94,924.72 = 40,509.12/x
  3. Step 3: Cross multiply
    68,786x = 94,924.72 × 40,509.12
  4. Step 4: Simplify right side
    68,786x = 3,845,316,873.45
  5. Step 5: Solve for x
    x = 3,845,316,873.45/68,786
  6. Step 6: Final answer
    x = 55,902.61

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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.