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Finding the Fourth Proportional to 70,723.99, 105,989.37 and 39,087.19

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Solution

The fourth proportional to 70,723.99, 105,989.37 and 39,087.19 is: 58,577.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,723.99 : 105,989.37 = 39,087.19 : x
  2. Step 2: Convert to fraction form
    70,723.99/105,989.37 = 39,087.19/x
  3. Step 3: Cross multiply
    70,723.99x = 105,989.37 × 39,087.19
  4. Step 4: Simplify right side
    70,723.99x = 4,142,826,643.17
  5. Step 5: Solve for x
    x = 4,142,826,643.17/70,723.99
  6. Step 6: Final answer
    x = 58,577.39

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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.