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Finding the Fourth Proportional to 72,505.82, 108,763.91 and 30,343.45

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Solution

The fourth proportional to 72,505.82, 108,763.91 and 30,343.45 is: 45,517.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,505.82 : 108,763.91 = 30,343.45 : x
  2. Step 2: Convert to fraction form
    72,505.82/108,763.91 = 30,343.45/x
  3. Step 3: Cross multiply
    72,505.82x = 108,763.91 × 30,343.45
  4. Step 4: Simplify right side
    72,505.82x = 3,300,271,751.12
  5. Step 5: Solve for x
    x = 3,300,271,751.12/72,505.82
  6. Step 6: Final answer
    x = 45,517.34

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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.