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Finding the Fourth Proportional to 128,410.43, 192,661.07 and 57,326.45

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Solution

The fourth proportional to 128,410.43, 192,661.07 and 57,326.45 is: 86,009.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,410.43 : 192,661.07 = 57,326.45 : x
  2. Step 2: Convert to fraction form
    128,410.43/192,661.07 = 57,326.45/x
  3. Step 3: Cross multiply
    128,410.43x = 192,661.07 × 57,326.45
  4. Step 4: Simplify right side
    128,410.43x = 11,044,573,946.36
  5. Step 5: Solve for x
    x = 11,044,573,946.36/128,410.43
  6. Step 6: Final answer
    x = 86,009.95

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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.