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Finding the Fourth Proportional to 71,068.69, 106,584.45 and 21,135.34

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Solution

The fourth proportional to 71,068.69, 106,584.45 and 21,135.34 is: 31,697.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,068.69 : 106,584.45 = 21,135.34 : x
  2. Step 2: Convert to fraction form
    71,068.69/106,584.45 = 21,135.34/x
  3. Step 3: Cross multiply
    71,068.69x = 106,584.45 × 21,135.34
  4. Step 4: Simplify right side
    71,068.69x = 2,252,698,589.46
  5. Step 5: Solve for x
    x = 2,252,698,589.46/71,068.69
  6. Step 6: Final answer
    x = 31,697.48

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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.