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Finding the Fourth Proportional to 72,809.79, 108,980.94 and 39,028.84

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Solution

The fourth proportional to 72,809.79, 108,980.94 and 39,028.84 is: 58,417.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,809.79 : 108,980.94 = 39,028.84 : x
  2. Step 2: Convert to fraction form
    72,809.79/108,980.94 = 39,028.84/x
  3. Step 3: Cross multiply
    72,809.79x = 108,980.94 × 39,028.84
  4. Step 4: Simplify right side
    72,809.79x = 4,253,399,544.22
  5. Step 5: Solve for x
    x = 4,253,399,544.22/72,809.79
  6. Step 6: Final answer
    x = 58,417.96

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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.