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Finding the Fourth Proportional to 86,969.17, 120,075.02 and 66,789.84

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Solution

The fourth proportional to 86,969.17, 120,075.02 and 66,789.84 is: 92,214.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,969.17 : 120,075.02 = 66,789.84 : x
  2. Step 2: Convert to fraction form
    86,969.17/120,075.02 = 66,789.84/x
  3. Step 3: Cross multiply
    86,969.17x = 120,075.02 × 66,789.84
  4. Step 4: Simplify right side
    86,969.17x = 8,019,790,439.47
  5. Step 5: Solve for x
    x = 8,019,790,439.47/86,969.17
  6. Step 6: Final answer
    x = 92,214.18

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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.