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Finding the Fourth Proportional to 70,899.72, 106,349.49 and 18,308.94

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Solution

The fourth proportional to 70,899.72, 106,349.49 and 18,308.94 is: 27,463.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,899.72 : 106,349.49 = 18,308.94 : x
  2. Step 2: Convert to fraction form
    70,899.72/106,349.49 = 18,308.94/x
  3. Step 3: Cross multiply
    70,899.72x = 106,349.49 × 18,308.94
  4. Step 4: Simplify right side
    70,899.72x = 1,947,146,431.44
  5. Step 5: Solve for x
    x = 1,947,146,431.44/70,899.72
  6. Step 6: Final answer
    x = 27,463.39

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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.