Home / 129,170.30-178,271.48-72,581.67

Finding the Fourth Proportional to 129,170.30, 178,271.48 and 72,581.67

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Solution

The fourth proportional to 129,170.30, 178,271.48 and 72,581.67 is: 100,171.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,170.30 : 178,271.48 = 72,581.67 : x
  2. Step 2: Convert to fraction form
    129,170.30/178,271.48 = 72,581.67/x
  3. Step 3: Cross multiply
    129,170.30x = 178,271.48 × 72,581.67
  4. Step 4: Simplify right side
    129,170.30x = 12,939,241,913.23
  5. Step 5: Solve for x
    x = 12,939,241,913.23/129,170.30
  6. Step 6: Final answer
    x = 100,171.96

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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.