Home / 128,618.38-177,554.97-85,669.34

Finding the Fourth Proportional to 128,618.38, 177,554.97 and 85,669.34

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Solution

The fourth proportional to 128,618.38, 177,554.97 and 85,669.34 is: 118,264.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,618.38 : 177,554.97 = 85,669.34 : x
  2. Step 2: Convert to fraction form
    128,618.38/177,554.97 = 85,669.34/x
  3. Step 3: Cross multiply
    128,618.38x = 177,554.97 × 85,669.34
  4. Step 4: Simplify right side
    128,618.38x = 15,211,017,093.62
  5. Step 5: Solve for x
    x = 15,211,017,093.62/128,618.38
  6. Step 6: Final answer
    x = 118,264.72

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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.