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Finding the Fourth Proportional to 72,923.54, 100,634.53 and 39,389.54

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Solution

The fourth proportional to 72,923.54, 100,634.53 and 39,389.54 is: 54,357.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,923.54 : 100,634.53 = 39,389.54 : x
  2. Step 2: Convert to fraction form
    72,923.54/100,634.53 = 39,389.54/x
  3. Step 3: Cross multiply
    72,923.54x = 100,634.53 × 39,389.54
  4. Step 4: Simplify right side
    72,923.54x = 3,963,947,844.82
  5. Step 5: Solve for x
    x = 3,963,947,844.82/72,923.54
  6. Step 6: Final answer
    x = 54,357.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.