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Finding the Fourth Proportional to 72,421.80, 108,671.04 and 35,485.80

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Solution

The fourth proportional to 72,421.80, 108,671.04 and 35,485.80 is: 53,247.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,421.80 : 108,671.04 = 35,485.80 : x
  2. Step 2: Convert to fraction form
    72,421.80/108,671.04 = 35,485.80/x
  3. Step 3: Cross multiply
    72,421.80x = 108,671.04 × 35,485.80
  4. Step 4: Simplify right side
    72,421.80x = 3,856,278,791.23
  5. Step 5: Solve for x
    x = 3,856,278,791.23/72,421.80
  6. Step 6: Final answer
    x = 53,247.49

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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.