Home / 129,293.72-178,311.76-90,511.67

Finding the Fourth Proportional to 129,293.72, 178,311.76 and 90,511.67

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Solution

The fourth proportional to 129,293.72, 178,311.76 and 90,511.67 is: 124,826.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,293.72 : 178,311.76 = 90,511.67 : x
  2. Step 2: Convert to fraction form
    129,293.72/178,311.76 = 90,511.67/x
  3. Step 3: Cross multiply
    129,293.72x = 178,311.76 × 90,511.67
  4. Step 4: Simplify right side
    129,293.72x = 16,139,294,725.68
  5. Step 5: Solve for x
    x = 16,139,294,725.68/129,293.72
  6. Step 6: Final answer
    x = 124,826.60

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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.