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Finding the Fourth Proportional to 65,622, 90,558.36 and 40,486.08

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Solution

The fourth proportional to 65,622, 90,558.36 and 40,486.08 is: 55,870.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,622 : 90,558.36 = 40,486.08 : x
  2. Step 2: Convert to fraction form
    65,622/90,558.36 = 40,486.08/x
  3. Step 3: Cross multiply
    65,622x = 90,558.36 × 40,486.08
  4. Step 4: Simplify right side
    65,622x = 3,666,353,007.63
  5. Step 5: Solve for x
    x = 3,666,353,007.63/65,622
  6. Step 6: Final answer
    x = 55,870.79

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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.