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Finding the Fourth Proportional to 65,390.63, 98,086.85 and 18,643.50

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Solution

The fourth proportional to 65,390.63, 98,086.85 and 18,643.50 is: 27,965.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,390.63 : 98,086.85 = 18,643.50 : x
  2. Step 2: Convert to fraction form
    65,390.63/98,086.85 = 18,643.50/x
  3. Step 3: Cross multiply
    65,390.63x = 98,086.85 × 18,643.50
  4. Step 4: Simplify right side
    65,390.63x = 1,828,682,164.67
  5. Step 5: Solve for x
    x = 1,828,682,164.67/65,390.63
  6. Step 6: Final answer
    x = 27,965.51

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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.