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Finding the Fourth Proportional to 128,252.77, 192,345.64 and 38,274.32

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Solution

The fourth proportional to 128,252.77, 192,345.64 and 38,274.32 is: 57,401.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,252.77 : 192,345.64 = 38,274.32 : x
  2. Step 2: Convert to fraction form
    128,252.77/192,345.64 = 38,274.32/x
  3. Step 3: Cross multiply
    128,252.77x = 192,345.64 × 38,274.32
  4. Step 4: Simplify right side
    128,252.77x = 7,361,898,961.14
  5. Step 5: Solve for x
    x = 7,361,898,961.14/128,252.77
  6. Step 6: Final answer
    x = 57,401.48

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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.