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Finding the Fourth Proportional to 128,470.46, 192,705.08 and 57,374.73

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Solution

The fourth proportional to 128,470.46, 192,705.08 and 57,374.73 is: 86,061.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,470.46 : 192,705.08 = 57,374.73 : x
  2. Step 2: Convert to fraction form
    128,470.46/192,705.08 = 57,374.73/x
  3. Step 3: Cross multiply
    128,470.46x = 192,705.08 × 57,374.73
  4. Step 4: Simplify right side
    128,470.46x = 11,056,401,647.75
  5. Step 5: Solve for x
    x = 11,056,401,647.75/128,470.46
  6. Step 6: Final answer
    x = 86,061.82

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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.