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Finding the Fourth Proportional to 72,405.70, 108,608.55 and 50,287.30

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Solution

The fourth proportional to 72,405.70, 108,608.55 and 50,287.30 is: 75,430.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,405.70 : 108,608.55 = 50,287.30 : x
  2. Step 2: Convert to fraction form
    72,405.70/108,608.55 = 50,287.30/x
  3. Step 3: Cross multiply
    72,405.70x = 108,608.55 × 50,287.30
  4. Step 4: Simplify right side
    72,405.70x = 5,461,630,736.42
  5. Step 5: Solve for x
    x = 5,461,630,736.42/72,405.70
  6. Step 6: Final answer
    x = 75,430.95

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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.