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Finding the Fourth Proportional to 128,066.54, 192,072.30 and 38,087.58

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Solution

The fourth proportional to 128,066.54, 192,072.30 and 38,087.58 is: 57,123.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,066.54 : 192,072.30 = 38,087.58 : x
  2. Step 2: Convert to fraction form
    128,066.54/192,072.30 = 38,087.58/x
  3. Step 3: Cross multiply
    128,066.54x = 192,072.30 × 38,087.58
  4. Step 4: Simplify right side
    128,066.54x = 7,315,569,669.48
  5. Step 5: Solve for x
    x = 7,315,569,669.48/128,066.54
  6. Step 6: Final answer
    x = 57,123.20

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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.