Home / 78,099.35-117,124.77-28,172.95

Finding the Fourth Proportional to 78,099.35, 117,124.77 and 28,172.95

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Solution

The fourth proportional to 78,099.35, 117,124.77 and 28,172.95 is: 42,250.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,099.35 : 117,124.77 = 28,172.95 : x
  2. Step 2: Convert to fraction form
    78,099.35/117,124.77 = 28,172.95/x
  3. Step 3: Cross multiply
    78,099.35x = 117,124.77 × 28,172.95
  4. Step 4: Simplify right side
    78,099.35x = 3,299,749,943.34
  5. Step 5: Solve for x
    x = 3,299,749,943.34/78,099.35
  6. Step 6: Final answer
    x = 42,250.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.