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Finding the Fourth Proportional to 72,276.80, 108,415.20 and 50,115.20

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Solution

The fourth proportional to 72,276.80, 108,415.20 and 50,115.20 is: 75,172.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,276.80 : 108,415.20 = 50,115.20 : x
  2. Step 2: Convert to fraction form
    72,276.80/108,415.20 = 50,115.20/x
  3. Step 3: Cross multiply
    72,276.80x = 108,415.20 × 50,115.20
  4. Step 4: Simplify right side
    72,276.80x = 5,433,249,431.04
  5. Step 5: Solve for x
    x = 5,433,249,431.04/72,276.80
  6. Step 6: Final answer
    x = 75,172.80

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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.