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Finding the Fourth Proportional to 128,391.63, 192,462.29 and 53,533.17

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Solution

The fourth proportional to 128,391.63, 192,462.29 and 53,533.17 is: 80,247.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,391.63 : 192,462.29 = 53,533.17 : x
  2. Step 2: Convert to fraction form
    128,391.63/192,462.29 = 53,533.17/x
  3. Step 3: Cross multiply
    128,391.63x = 192,462.29 × 53,533.17
  4. Step 4: Simplify right side
    128,391.63x = 10,303,116,221.49
  5. Step 5: Solve for x
    x = 10,303,116,221.49/128,391.63
  6. Step 6: Final answer
    x = 80,247.57

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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.