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Finding the Fourth Proportional to 72,924.75, 100,636.16 and 39,390.75

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Solution

The fourth proportional to 72,924.75, 100,636.16 and 39,390.75 is: 54,359.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,924.75 : 100,636.16 = 39,390.75 : x
  2. Step 2: Convert to fraction form
    72,924.75/100,636.16 = 39,390.75/x
  3. Step 3: Cross multiply
    72,924.75x = 100,636.16 × 39,390.75
  4. Step 4: Simplify right side
    72,924.75x = 3,964,133,622.57
  5. Step 5: Solve for x
    x = 3,964,133,622.57/72,924.75
  6. Step 6: Final answer
    x = 54,359.24

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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.