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Finding the Fourth Proportional to 73,108.40, 109,662.60 and 28,720.40

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Solution

The fourth proportional to 73,108.40, 109,662.60 and 28,720.40 is: 43,080.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,108.40 : 109,662.60 = 28,720.40 : x
  2. Step 2: Convert to fraction form
    73,108.40/109,662.60 = 28,720.40/x
  3. Step 3: Cross multiply
    73,108.40x = 109,662.60 × 28,720.40
  4. Step 4: Simplify right side
    73,108.40x = 3,149,553,737.04
  5. Step 5: Solve for x
    x = 3,149,553,737.04/73,108.40
  6. Step 6: Final answer
    x = 43,080.60

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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.