Home / 66,991.96-92,451.60-40,129.12

Finding the Fourth Proportional to 66,991.96, 92,451.60 and 40,129.12

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Solution

The fourth proportional to 66,991.96, 92,451.60 and 40,129.12 is: 55,379.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,991.96 : 92,451.60 = 40,129.12 : x
  2. Step 2: Convert to fraction form
    66,991.96/92,451.60 = 40,129.12/x
  3. Step 3: Cross multiply
    66,991.96x = 92,451.60 × 40,129.12
  4. Step 4: Simplify right side
    66,991.96x = 3,710,001,350.59
  5. Step 5: Solve for x
    x = 3,710,001,350.59/66,991.96
  6. Step 6: Final answer
    x = 55,379.80

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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.