Home / 79,078.40-109,128.12-43,268.56

Finding the Fourth Proportional to 79,078.40, 109,128.12 and 43,268.56

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Solution

The fourth proportional to 79,078.40, 109,128.12 and 43,268.56 is: 59,710.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,078.40 : 109,128.12 = 43,268.56 : x
  2. Step 2: Convert to fraction form
    79,078.40/109,128.12 = 43,268.56/x
  3. Step 3: Cross multiply
    79,078.40x = 109,128.12 × 43,268.56
  4. Step 4: Simplify right side
    79,078.40x = 4,721,816,607.91
  5. Step 5: Solve for x
    x = 4,721,816,607.91/79,078.40
  6. Step 6: Final answer
    x = 59,710.57

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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.