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Finding the Fourth Proportional to 128,860.10, 192,962.10 and 122,955.20

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Solution

The fourth proportional to 128,860.10, 192,962.10 and 122,955.20 is: 184,119.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,860.10 : 192,962.10 = 122,955.20 : x
  2. Step 2: Convert to fraction form
    128,860.10/192,962.10 = 122,955.20/x
  3. Step 3: Cross multiply
    128,860.10x = 192,962.10 × 122,955.20
  4. Step 4: Simplify right side
    128,860.10x = 23,725,693,597.92
  5. Step 5: Solve for x
    x = 23,725,693,597.92/128,860.10
  6. Step 6: Final answer
    x = 184,119.78

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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.