Home / 72,021.91-99,390.09-40,188.91

Finding the Fourth Proportional to 72,021.91, 99,390.09 and 40,188.91

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Solution

The fourth proportional to 72,021.91, 99,390.09 and 40,188.91 is: 55,460.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,021.91 : 99,390.09 = 40,188.91 : x
  2. Step 2: Convert to fraction form
    72,021.91/99,390.09 = 40,188.91/x
  3. Step 3: Cross multiply
    72,021.91x = 99,390.09 × 40,188.91
  4. Step 4: Simplify right side
    72,021.91x = 3,994,379,381.90
  5. Step 5: Solve for x
    x = 3,994,379,381.90/72,021.91
  6. Step 6: Final answer
    x = 55,460.61

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1.5x scale

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.