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Finding the Fourth Proportional to 68,762.36, 103,143.58 and 18,842.88

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Solution

The fourth proportional to 68,762.36, 103,143.58 and 18,842.88 is: 28,264.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,762.36 : 103,143.58 = 18,842.88 : x
  2. Step 2: Convert to fraction form
    68,762.36/103,143.58 = 18,842.88/x
  3. Step 3: Cross multiply
    68,762.36x = 103,143.58 × 18,842.88
  4. Step 4: Simplify right side
    68,762.36x = 1,943,522,100.71
  5. Step 5: Solve for x
    x = 1,943,522,100.71/68,762.36
  6. Step 6: Final answer
    x = 28,264.33

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1.5x scale

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.