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Finding the Fourth Proportional to 78,486.45, 117,729.67 and 23,082.45

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Solution

The fourth proportional to 78,486.45, 117,729.67 and 23,082.45 is: 34,623.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,486.45 : 117,729.67 = 23,082.45 : x
  2. Step 2: Convert to fraction form
    78,486.45/117,729.67 = 23,082.45/x
  3. Step 3: Cross multiply
    78,486.45x = 117,729.67 × 23,082.45
  4. Step 4: Simplify right side
    78,486.45x = 2,717,488,632.64
  5. Step 5: Solve for x
    x = 2,717,488,632.64/78,486.45
  6. Step 6: Final answer
    x = 34,623.67

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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.