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Finding the Fourth Proportional to 128,901.65, 193,361.69 and 53,946.32

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Solution

The fourth proportional to 128,901.65, 193,361.69 and 53,946.32 is: 80,923.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,901.65 : 193,361.69 = 53,946.32 : x
  2. Step 2: Convert to fraction form
    128,901.65/193,361.69 = 53,946.32/x
  3. Step 3: Cross multiply
    128,901.65x = 193,361.69 × 53,946.32
  4. Step 4: Simplify right side
    128,901.65x = 10,431,151,604.48
  5. Step 5: Solve for x
    x = 10,431,151,604.48/128,901.65
  6. Step 6: Final answer
    x = 80,923.34

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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.