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Finding the Fourth Proportional to 281,140.90, 421,711.01 and 70,778.84

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Solution

The fourth proportional to 281,140.90, 421,711.01 and 70,778.84 is: 106,168.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,140.90 : 421,711.01 = 70,778.84 : x
  2. Step 2: Convert to fraction form
    281,140.90/421,711.01 = 70,778.84/x
  3. Step 3: Cross multiply
    281,140.90x = 421,711.01 × 70,778.84
  4. Step 4: Simplify right side
    281,140.90x = 29,848,215,092.06
  5. Step 5: Solve for x
    x = 29,848,215,092.06/281,140.90
  6. Step 6: Final answer
    x = 106,168.17

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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.