Home / 128,325.45-177,005.69-82,312.27

Finding the Fourth Proportional to 128,325.45, 177,005.69 and 82,312.27

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Solution

The fourth proportional to 128,325.45, 177,005.69 and 82,312.27 is: 113,537.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,325.45 : 177,005.69 = 82,312.27 : x
  2. Step 2: Convert to fraction form
    128,325.45/177,005.69 = 82,312.27/x
  3. Step 3: Cross multiply
    128,325.45x = 177,005.69 × 82,312.27
  4. Step 4: Simplify right side
    128,325.45x = 14,569,739,735.26
  5. Step 5: Solve for x
    x = 14,569,739,735.26/128,325.45
  6. Step 6: Final answer
    x = 113,537.42

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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.