Home / 129,435.44-178,676.01-87,018.57

Finding the Fourth Proportional to 129,435.44, 178,676.01 and 87,018.57

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Solution

The fourth proportional to 129,435.44, 178,676.01 and 87,018.57 is: 120,122.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,435.44 : 178,676.01 = 87,018.57 : x
  2. Step 2: Convert to fraction form
    129,435.44/178,676.01 = 87,018.57/x
  3. Step 3: Cross multiply
    129,435.44x = 178,676.01 × 87,018.57
  4. Step 4: Simplify right side
    129,435.44x = 15,548,130,883.51
  5. Step 5: Solve for x
    x = 15,548,130,883.51/129,435.44
  6. Step 6: Final answer
    x = 120,122.67

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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.