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Finding the Fourth Proportional to 77,991.84, 117,010.44 and 28,071.04

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Solution

The fourth proportional to 77,991.84, 117,010.44 and 28,071.04 is: 42,114.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,991.84 : 117,010.44 = 28,071.04 : x
  2. Step 2: Convert to fraction form
    77,991.84/117,010.44 = 28,071.04/x
  3. Step 3: Cross multiply
    77,991.84x = 117,010.44 × 28,071.04
  4. Step 4: Simplify right side
    77,991.84x = 3,284,604,741.66
  5. Step 5: Solve for x
    x = 3,284,604,741.66/77,991.84
  6. Step 6: Final answer
    x = 42,114.72

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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.