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Finding the Fourth Proportional to 68,858.79, 103,288.65 and 18,944.16

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Solution

The fourth proportional to 68,858.79, 103,288.65 and 18,944.16 is: 28,416.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,858.79 : 103,288.65 = 18,944.16 : x
  2. Step 2: Convert to fraction form
    68,858.79/103,288.65 = 18,944.16/x
  3. Step 3: Cross multiply
    68,858.79x = 103,288.65 × 18,944.16
  4. Step 4: Simplify right side
    68,858.79x = 1,956,716,617.06
  5. Step 5: Solve for x
    x = 1,956,716,617.06/68,858.79
  6. Step 6: Final answer
    x = 28,416.37

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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.