Home / 66,128.81-91,268.98-39,285.81

Finding the Fourth Proportional to 66,128.81, 91,268.98 and 39,285.81

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Solution

The fourth proportional to 66,128.81, 91,268.98 and 39,285.81 is: 54,221.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,128.81 : 91,268.98 = 39,285.81 : x
  2. Step 2: Convert to fraction form
    66,128.81/91,268.98 = 39,285.81/x
  3. Step 3: Cross multiply
    66,128.81x = 91,268.98 × 39,285.81
  4. Step 4: Simplify right side
    66,128.81x = 3,585,575,708.96
  5. Step 5: Solve for x
    x = 3,585,575,708.96/66,128.81
  6. Step 6: Final answer
    x = 54,221.09

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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.