Home / 78,081.21-117,122.63-61,529.67

Finding the Fourth Proportional to 78,081.21, 117,122.63 and 61,529.67

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Solution

The fourth proportional to 78,081.21, 117,122.63 and 61,529.67 is: 92,295.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,081.21 : 117,122.63 = 61,529.67 : x
  2. Step 2: Convert to fraction form
    78,081.21/117,122.63 = 61,529.67/x
  3. Step 3: Cross multiply
    78,081.21x = 117,122.63 × 61,529.67
  4. Step 4: Simplify right side
    78,081.21x = 7,206,516,465.78
  5. Step 5: Solve for x
    x = 7,206,516,465.78/78,081.21
  6. Step 6: Final answer
    x = 92,295.14

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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.