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Finding the Fourth Proportional to 345,709.68, 518,564.52 and 109,076.28

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Solution

The fourth proportional to 345,709.68, 518,564.52 and 109,076.28 is: 163,614.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,709.68 : 518,564.52 = 109,076.28 : x
  2. Step 2: Convert to fraction form
    345,709.68/518,564.52 = 109,076.28/x
  3. Step 3: Cross multiply
    345,709.68x = 518,564.52 × 109,076.28
  4. Step 4: Simplify right side
    345,709.68x = 56,563,088,781.59
  5. Step 5: Solve for x
    x = 56,563,088,781.59/345,709.68
  6. Step 6: Final answer
    x = 163,614.42

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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.