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Finding the Fourth Proportional to 53,218.92, 79,830.81 and 18,158.88

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Solution

The fourth proportional to 53,218.92, 79,830.81 and 18,158.88 is: 27,239.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,218.92 : 79,830.81 = 18,158.88 : x
  2. Step 2: Convert to fraction form
    53,218.92/79,830.81 = 18,158.88/x
  3. Step 3: Cross multiply
    53,218.92x = 79,830.81 × 18,158.88
  4. Step 4: Simplify right side
    53,218.92x = 1,449,638,099.09
  5. Step 5: Solve for x
    x = 1,449,638,099.09/53,218.92
  6. Step 6: Final answer
    x = 27,239.15

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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.