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Finding the Fourth Proportional to 72,973.75, 100,703.79 and 39,439.75

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Solution

The fourth proportional to 72,973.75, 100,703.79 and 39,439.75 is: 54,426.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,973.75 : 100,703.79 = 39,439.75 : x
  2. Step 2: Convert to fraction form
    72,973.75/100,703.79 = 39,439.75/x
  3. Step 3: Cross multiply
    72,973.75x = 100,703.79 × 39,439.75
  4. Step 4: Simplify right side
    72,973.75x = 3,971,732,301.65
  5. Step 5: Solve for x
    x = 3,971,732,301.65/72,973.75
  6. Step 6: Final answer
    x = 54,426.86

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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.