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Finding the Fourth Proportional to 75,976.84, 104,842.79 and 41,985

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Solution

The fourth proportional to 75,976.84, 104,842.79 and 41,985 is: 57,936.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,976.84 : 104,842.79 = 41,985 : x
  2. Step 2: Convert to fraction form
    75,976.84/104,842.79 = 41,985/x
  3. Step 3: Cross multiply
    75,976.84x = 104,842.79 × 41,985
  4. Step 4: Simplify right side
    75,976.84x = 4,401,824,485.67
  5. Step 5: Solve for x
    x = 4,401,824,485.67/75,976.84
  6. Step 6: Final answer
    x = 57,936.40

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1.5x scale

Why These Related Problems?

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