Home / 72,911.20-109,148.10-43,313.80

Finding the Fourth Proportional to 72,911.20, 109,148.10 and 43,313.80

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Solution

The fourth proportional to 72,911.20, 109,148.10 and 43,313.80 is: 64,840.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,911.20 : 109,148.10 = 43,313.80 : x
  2. Step 2: Convert to fraction form
    72,911.20/109,148.10 = 43,313.80/x
  3. Step 3: Cross multiply
    72,911.20x = 109,148.10 × 43,313.80
  4. Step 4: Simplify right side
    72,911.20x = 4,727,618,973.78
  5. Step 5: Solve for x
    x = 4,727,618,973.78/72,911.20
  6. Step 6: Final answer
    x = 64,840.78

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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.