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Finding the Fourth Proportional to 128,703.56, 192,792.54 and 66,242.84

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Solution

The fourth proportional to 128,703.56, 192,792.54 and 66,242.84 is: 99,229.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,703.56 : 192,792.54 = 66,242.84 : x
  2. Step 2: Convert to fraction form
    128,703.56/192,792.54 = 66,242.84/x
  3. Step 3: Cross multiply
    128,703.56x = 192,792.54 × 66,242.84
  4. Step 4: Simplify right side
    128,703.56x = 12,771,125,380.41
  5. Step 5: Solve for x
    x = 12,771,125,380.41/128,703.56
  6. Step 6: Final answer
    x = 99,229.00

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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.