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Finding the Fourth Proportional to 305,140.53, 421,137.53 and 169,204.71

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Solution

The fourth proportional to 305,140.53, 421,137.53 and 169,204.71 is: 233,526.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,140.53 : 421,137.53 = 169,204.71 : x
  2. Step 2: Convert to fraction form
    305,140.53/421,137.53 = 169,204.71/x
  3. Step 3: Cross multiply
    305,140.53x = 421,137.53 × 169,204.71
  4. Step 4: Simplify right side
    305,140.53x = 71,258,452,787.74
  5. Step 5: Solve for x
    x = 71,258,452,787.74/305,140.53
  6. Step 6: Final answer
    x = 233,526.67

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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.