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Finding the Fourth Proportional to 128,363.40, 192,026.70 and 111,025.80

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Solution

The fourth proportional to 128,363.40, 192,026.70 and 111,025.80 is: 166,090.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,363.40 : 192,026.70 = 111,025.80 : x
  2. Step 2: Convert to fraction form
    128,363.40/192,026.70 = 111,025.80/x
  3. Step 3: Cross multiply
    128,363.40x = 192,026.70 × 111,025.80
  4. Step 4: Simplify right side
    128,363.40x = 21,319,917,988.86
  5. Step 5: Solve for x
    x = 21,319,917,988.86/128,363.40
  6. Step 6: Final answer
    x = 166,090.32

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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.