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Finding the Fourth Proportional to 146,211.90, 218,880.45 and 128,715.90

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Solution

The fourth proportional to 146,211.90, 218,880.45 and 128,715.90 is: 192,688.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,211.90 : 218,880.45 = 128,715.90 : x
  2. Step 2: Convert to fraction form
    146,211.90/218,880.45 = 128,715.90/x
  3. Step 3: Cross multiply
    146,211.90x = 218,880.45 × 128,715.90
  4. Step 4: Simplify right side
    146,211.90x = 28,173,394,114.16
  5. Step 5: Solve for x
    x = 28,173,394,114.16/146,211.90
  6. Step 6: Final answer
    x = 192,688.79

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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.