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Finding the Fourth Proportional to 67,672.80, 101,509.20 and 20,930.40

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Solution

The fourth proportional to 67,672.80, 101,509.20 and 20,930.40 is: 31,395.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,672.80 : 101,509.20 = 20,930.40 : x
  2. Step 2: Convert to fraction form
    67,672.80/101,509.20 = 20,930.40/x
  3. Step 3: Cross multiply
    67,672.80x = 101,509.20 × 20,930.40
  4. Step 4: Simplify right side
    67,672.80x = 2,124,628,159.68
  5. Step 5: Solve for x
    x = 2,124,628,159.68/67,672.80
  6. Step 6: Final answer
    x = 31,395.60

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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.