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Finding the Fourth Proportional to 43,135.50, 64,706.90 and 11,970.75

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Solution

The fourth proportional to 43,135.50, 64,706.90 and 11,970.75 is: 17,957.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,135.50 : 64,706.90 = 11,970.75 : x
  2. Step 2: Convert to fraction form
    43,135.50/64,706.90 = 11,970.75/x
  3. Step 3: Cross multiply
    43,135.50x = 64,706.90 × 11,970.75
  4. Step 4: Simplify right side
    43,135.50x = 774,590,063.32
  5. Step 5: Solve for x
    x = 774,590,063.32/43,135.50
  6. Step 6: Final answer
    x = 17,957.14

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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.