Home / 66,790.12-92,143.98-39,922.84

Finding the Fourth Proportional to 66,790.12, 92,143.98 and 39,922.84

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Solution

The fourth proportional to 66,790.12, 92,143.98 and 39,922.84 is: 55,077.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,790.12 : 92,143.98 = 39,922.84 : x
  2. Step 2: Convert to fraction form
    66,790.12/92,143.98 = 39,922.84/x
  3. Step 3: Cross multiply
    66,790.12x = 92,143.98 × 39,922.84
  4. Step 4: Simplify right side
    66,790.12x = 3,678,649,370.50
  5. Step 5: Solve for x
    x = 3,678,649,370.50/66,790.12
  6. Step 6: Final answer
    x = 55,077.75

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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.