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Finding the Fourth Proportional to 72,975.06, 100,705.68 and 39,441.06

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Solution

The fourth proportional to 72,975.06, 100,705.68 and 39,441.06 is: 54,428.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,975.06 : 100,705.68 = 39,441.06 : x
  2. Step 2: Convert to fraction form
    72,975.06/100,705.68 = 39,441.06/x
  3. Step 3: Cross multiply
    72,975.06x = 100,705.68 × 39,441.06
  4. Step 4: Simplify right side
    72,975.06x = 3,971,938,767.22
  5. Step 5: Solve for x
    x = 3,971,938,767.22/72,975.06
  6. Step 6: Final answer
    x = 54,428.72

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