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Finding the Fourth Proportional to 72,730.80, 109,009.80 and 30,610.80

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Solution

The fourth proportional to 72,730.80, 109,009.80 and 30,610.80 is: 45,879.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,730.80 : 109,009.80 = 30,610.80 : x
  2. Step 2: Convert to fraction form
    72,730.80/109,009.80 = 30,610.80/x
  3. Step 3: Cross multiply
    72,730.80x = 109,009.80 × 30,610.80
  4. Step 4: Simplify right side
    72,730.80x = 3,336,877,185.84
  5. Step 5: Solve for x
    x = 3,336,877,185.84/72,730.80
  6. Step 6: Final answer
    x = 45,879.84

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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.