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Finding the Fourth Proportional to 128,107.08, 192,157.94 and 42,724.08

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Solution

The fourth proportional to 128,107.08, 192,157.94 and 42,724.08 is: 64,085.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,107.08 : 192,157.94 = 42,724.08 : x
  2. Step 2: Convert to fraction form
    128,107.08/192,157.94 = 42,724.08/x
  3. Step 3: Cross multiply
    128,107.08x = 192,157.94 × 42,724.08
  4. Step 4: Simplify right side
    128,107.08x = 8,209,771,201.20
  5. Step 5: Solve for x
    x = 8,209,771,201.20/128,107.08
  6. Step 6: Final answer
    x = 64,085.23

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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.