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Finding the Fourth Proportional to 131,074.16, 180,880.17 and 72,928.72

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Solution

The fourth proportional to 131,074.16, 180,880.17 and 72,928.72 is: 100,640.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,074.16 : 180,880.17 = 72,928.72 : x
  2. Step 2: Convert to fraction form
    131,074.16/180,880.17 = 72,928.72/x
  3. Step 3: Cross multiply
    131,074.16x = 180,880.17 × 72,928.72
  4. Step 4: Simplify right side
    131,074.16x = 13,191,358,367.08
  5. Step 5: Solve for x
    x = 13,191,358,367.08/131,074.16
  6. Step 6: Final answer
    x = 100,640.42

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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.