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Finding the Fourth Proportional to 117,706.32, 162,315.51 and 100,766.67

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Solution

The fourth proportional to 117,706.32, 162,315.51 and 100,766.67 is: 138,955.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,706.32 : 162,315.51 = 100,766.67 : x
  2. Step 2: Convert to fraction form
    117,706.32/162,315.51 = 100,766.67/x
  3. Step 3: Cross multiply
    117,706.32x = 162,315.51 × 100,766.67
  4. Step 4: Simplify right side
    117,706.32x = 16,355,993,432.05
  5. Step 5: Solve for x
    x = 16,355,993,432.05/117,706.32
  6. Step 6: Final answer
    x = 138,955.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.