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Finding the Fourth Proportional to 67,782.80, 101,674.20 and 21,040.40

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Solution

The fourth proportional to 67,782.80, 101,674.20 and 21,040.40 is: 31,560.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,782.80 : 101,674.20 = 21,040.40 : x
  2. Step 2: Convert to fraction form
    67,782.80/101,674.20 = 21,040.40/x
  3. Step 3: Cross multiply
    67,782.80x = 101,674.20 × 21,040.40
  4. Step 4: Simplify right side
    67,782.80x = 2,139,265,837.68
  5. Step 5: Solve for x
    x = 2,139,265,837.68/67,782.80
  6. Step 6: Final answer
    x = 31,560.60

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1.5x scale

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.