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Finding the Fourth Proportional to 70,137.90, 105,207.26 and 23,390.64

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Solution

The fourth proportional to 70,137.90, 105,207.26 and 23,390.64 is: 35,086.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,137.90 : 105,207.26 = 23,390.64 : x
  2. Step 2: Convert to fraction form
    70,137.90/105,207.26 = 23,390.64/x
  3. Step 3: Cross multiply
    70,137.90x = 105,207.26 × 23,390.64
  4. Step 4: Simplify right side
    70,137.90x = 2,460,865,027.09
  5. Step 5: Solve for x
    x = 2,460,865,027.09/70,137.90
  6. Step 6: Final answer
    x = 35,086.10

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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.