Home / 72,485,221.77-100,029,622.37-39,890,173.77

Finding the Fourth Proportional to 72,485,221.77, 100,029,622.37 and 39,890,173.77

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Solution

The fourth proportional to 72,485,221.77, 100,029,622.37 and 39,890,173.77 is: 55,048,448.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,485,221.77 : 100,029,622.37 = 39,890,173.77 : x
  2. Step 2: Convert to fraction form
    72,485,221.77/100,029,622.37 = 39,890,173.77/x
  3. Step 3: Cross multiply
    72,485,221.77x = 100,029,622.37 × 39,890,173.77
  4. Step 4: Simplify right side
    72,485,221.77x = 3,990,199,018,486,780
  5. Step 5: Solve for x
    x = 3,990,199,018,486,780/72,485,221.77
  6. Step 6: Final answer
    x = 55,048,448.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.