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Finding the Fourth Proportional to 75,696.78, 103,705.05 and 72,859.08

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Solution

The fourth proportional to 75,696.78, 103,705.05 and 72,859.08 is: 99,817.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,696.78 : 103,705.05 = 72,859.08 : x
  2. Step 2: Convert to fraction form
    75,696.78/103,705.05 = 72,859.08/x
  3. Step 3: Cross multiply
    75,696.78x = 103,705.05 × 72,859.08
  4. Step 4: Simplify right side
    75,696.78x = 7,555,854,534.35
  5. Step 5: Solve for x
    x = 7,555,854,534.35/75,696.78
  6. Step 6: Final answer
    x = 99,817.38

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These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.