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Finding the Fourth Proportional to 128,290.61, 192,435.90 and 57,194.88

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Solution

The fourth proportional to 128,290.61, 192,435.90 and 57,194.88 is: 85,792.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,290.61 : 192,435.90 = 57,194.88 : x
  2. Step 2: Convert to fraction form
    128,290.61/192,435.90 = 57,194.88/x
  3. Step 3: Cross multiply
    128,290.61x = 192,435.90 × 57,194.88
  4. Step 4: Simplify right side
    128,290.61x = 11,006,348,208.19
  5. Step 5: Solve for x
    x = 11,006,348,208.19/128,290.61
  6. Step 6: Final answer
    x = 85,792.32

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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.