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Finding the Fourth Proportional to 70,958.30, 106,454.96 and 21,038.39

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Solution

The fourth proportional to 70,958.30, 106,454.96 and 21,038.39 is: 31,562.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,958.30 : 106,454.96 = 21,038.39 : x
  2. Step 2: Convert to fraction form
    70,958.30/106,454.96 = 21,038.39/x
  3. Step 3: Cross multiply
    70,958.30x = 106,454.96 × 21,038.39
  4. Step 4: Simplify right side
    70,958.30x = 2,239,640,328.45
  5. Step 5: Solve for x
    x = 2,239,640,328.45/70,958.30
  6. Step 6: Final answer
    x = 31,562.77

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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.