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Finding the Fourth Proportional to 72,923.50, 100,634.47 and 39,389.50

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Solution

The fourth proportional to 72,923.50, 100,634.47 and 39,389.50 is: 54,357.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,923.50 : 100,634.47 = 39,389.50 : x
  2. Step 2: Convert to fraction form
    72,923.50/100,634.47 = 39,389.50/x
  3. Step 3: Cross multiply
    72,923.50x = 100,634.47 × 39,389.50
  4. Step 4: Simplify right side
    72,923.50x = 3,963,941,456.07
  5. Step 5: Solve for x
    x = 3,963,941,456.07/72,923.50
  6. Step 6: Final answer
    x = 54,357.53

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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.