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Finding the Fourth Proportional to 65,479.62, 90,359.52 and 40,028.64

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Solution

The fourth proportional to 65,479.62, 90,359.52 and 40,028.64 is: 55,238.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,479.62 : 90,359.52 = 40,028.64 : x
  2. Step 2: Convert to fraction form
    65,479.62/90,359.52 = 40,028.64/x
  3. Step 3: Cross multiply
    65,479.62x = 90,359.52 × 40,028.64
  4. Step 4: Simplify right side
    65,479.62x = 3,616,968,696.65
  5. Step 5: Solve for x
    x = 3,616,968,696.65/65,479.62
  6. Step 6: Final answer
    x = 55,238.08

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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.