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Finding the Fourth Proportional to 78,234.46, 117,071.34 and 67,740.70

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Solution

The fourth proportional to 78,234.46, 117,071.34 and 67,740.70 is: 101,368.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,234.46 : 117,071.34 = 67,740.70 : x
  2. Step 2: Convert to fraction form
    78,234.46/117,071.34 = 67,740.70/x
  3. Step 3: Cross multiply
    78,234.46x = 117,071.34 × 67,740.70
  4. Step 4: Simplify right side
    78,234.46x = 7,930,494,521.54
  5. Step 5: Solve for x
    x = 7,930,494,521.54/78,234.46
  6. Step 6: Final answer
    x = 101,368.30

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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.