Home / 81,421.61-122,687.06-66,954.60

Finding the Fourth Proportional to 81,421.61, 122,687.06 and 66,954.60

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Solution

The fourth proportional to 81,421.61, 122,687.06 and 66,954.60 is: 100,888.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,421.61 : 122,687.06 = 66,954.60 : x
  2. Step 2: Convert to fraction form
    81,421.61/122,687.06 = 66,954.60/x
  3. Step 3: Cross multiply
    81,421.61x = 122,687.06 × 66,954.60
  4. Step 4: Simplify right side
    81,421.61x = 8,214,462,692.70
  5. Step 5: Solve for x
    x = 8,214,462,692.70/81,421.61
  6. Step 6: Final answer
    x = 100,888.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.