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Finding the Fourth Proportional to 70,953.84, 106,431.18 and 21,034.37

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Solution

The fourth proportional to 70,953.84, 106,431.18 and 21,034.37 is: 31,551.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,953.84 : 106,431.18 = 21,034.37 : x
  2. Step 2: Convert to fraction form
    70,953.84/106,431.18 = 21,034.37/x
  3. Step 3: Cross multiply
    70,953.84x = 106,431.18 × 21,034.37
  4. Step 4: Simplify right side
    70,953.84x = 2,238,712,287.50
  5. Step 5: Solve for x
    x = 2,238,712,287.50/70,953.84
  6. Step 6: Final answer
    x = 31,551.67

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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.