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Finding the Fourth Proportional to 173,040.60, 259,706.70 and 78,416.40

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Solution

The fourth proportional to 173,040.60, 259,706.70 and 78,416.40 is: 117,690.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,040.60 : 259,706.70 = 78,416.40 : x
  2. Step 2: Convert to fraction form
    173,040.60/259,706.70 = 78,416.40/x
  3. Step 3: Cross multiply
    173,040.60x = 259,706.70 × 78,416.40
  4. Step 4: Simplify right side
    173,040.60x = 20,365,264,469.88
  5. Step 5: Solve for x
    x = 20,365,264,469.88/173,040.60
  6. Step 6: Final answer
    x = 117,690.67

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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.