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Finding the Fourth Proportional to 123,979.92, 171,088.68 and 67,389.84

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Solution

The fourth proportional to 123,979.92, 171,088.68 and 67,389.84 is: 92,996.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,979.92 : 171,088.68 = 67,389.84 : x
  2. Step 2: Convert to fraction form
    123,979.92/171,088.68 = 67,389.84/x
  3. Step 3: Cross multiply
    123,979.92x = 171,088.68 × 67,389.84
  4. Step 4: Simplify right side
    123,979.92x = 11,529,638,771.01
  5. Step 5: Solve for x
    x = 11,529,638,771.01/123,979.92
  6. Step 6: Final answer
    x = 92,996.02

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1.5x scale

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.