Home / 129,750.25-178,987.36-112,716.25

Finding the Fourth Proportional to 129,750.25, 178,987.36 and 112,716.25

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Solution

The fourth proportional to 129,750.25, 178,987.36 and 112,716.25 is: 155,489.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,750.25 : 178,987.36 = 112,716.25 : x
  2. Step 2: Convert to fraction form
    129,750.25/178,987.36 = 112,716.25/x
  3. Step 3: Cross multiply
    129,750.25x = 178,987.36 × 112,716.25
  4. Step 4: Simplify right side
    129,750.25x = 20,174,784,016.60
  5. Step 5: Solve for x
    x = 20,174,784,016.60/129,750.25
  6. Step 6: Final answer
    x = 155,489.37

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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.