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Finding the Fourth Proportional to 128,657.16, 192,963.06 and 49,706.46

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Solution

The fourth proportional to 128,657.16, 192,963.06 and 49,706.46 is: 74,550.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,657.16 : 192,963.06 = 49,706.46 : x
  2. Step 2: Convert to fraction form
    128,657.16/192,963.06 = 49,706.46/x
  3. Step 3: Cross multiply
    128,657.16x = 192,963.06 × 49,706.46
  4. Step 4: Simplify right side
    128,657.16x = 9,591,510,623.37
  5. Step 5: Solve for x
    x = 9,591,510,623.37/128,657.16
  6. Step 6: Final answer
    x = 74,550.93

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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.