Home / 128,386.35-177,144.57-74,676.06

Finding the Fourth Proportional to 128,386.35, 177,144.57 and 74,676.06

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Solution

The fourth proportional to 128,386.35, 177,144.57 and 74,676.06 is: 103,036.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,386.35 : 177,144.57 = 74,676.06 : x
  2. Step 2: Convert to fraction form
    128,386.35/177,144.57 = 74,676.06/x
  3. Step 3: Cross multiply
    128,386.35x = 177,144.57 × 74,676.06
  4. Step 4: Simplify right side
    128,386.35x = 13,228,458,537.99
  5. Step 5: Solve for x
    x = 13,228,458,537.99/128,386.35
  6. Step 6: Final answer
    x = 103,036.33

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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.