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Finding the Fourth Proportional to 43,124, 64,686.08 and 13,940

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Solution

The fourth proportional to 43,124, 64,686.08 and 13,940 is: 20,910.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,124 : 64,686.08 = 13,940 : x
  2. Step 2: Convert to fraction form
    43,124/64,686.08 = 13,940/x
  3. Step 3: Cross multiply
    43,124x = 64,686.08 × 13,940
  4. Step 4: Simplify right side
    43,124x = 901,723,955.20
  5. Step 5: Solve for x
    x = 901,723,955.20/43,124
  6. Step 6: Final answer
    x = 20,910.03

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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.