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Finding the Fourth Proportional to 70,809.66, 106,213.50 and 28,689.38

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Solution

The fourth proportional to 70,809.66, 106,213.50 and 28,689.38 is: 43,033.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,809.66 : 106,213.50 = 28,689.38 : x
  2. Step 2: Convert to fraction form
    70,809.66/106,213.50 = 28,689.38/x
  3. Step 3: Cross multiply
    70,809.66x = 106,213.50 × 28,689.38
  4. Step 4: Simplify right side
    70,809.66x = 3,047,199,462.63
  5. Step 5: Solve for x
    x = 3,047,199,462.63/70,809.66
  6. Step 6: Final answer
    x = 43,033.67

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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.