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Finding the Fourth Proportional to 43,200.63, 64,799.10 and 13,639.68

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Solution

The fourth proportional to 43,200.63, 64,799.10 and 13,639.68 is: 20,458.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,200.63 : 64,799.10 = 13,639.68 : x
  2. Step 2: Convert to fraction form
    43,200.63/64,799.10 = 13,639.68/x
  3. Step 3: Cross multiply
    43,200.63x = 64,799.10 × 13,639.68
  4. Step 4: Simplify right side
    43,200.63x = 883,838,988.29
  5. Step 5: Solve for x
    x = 883,838,988.29/43,200.63
  6. Step 6: Final answer
    x = 20,458.94

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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.