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Finding the Fourth Proportional to 109,871.10, 165,069.09 and 70,505.10

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Solution

The fourth proportional to 109,871.10, 165,069.09 and 70,505.10 is: 105,926.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,871.10 : 165,069.09 = 70,505.10 : x
  2. Step 2: Convert to fraction form
    109,871.10/165,069.09 = 70,505.10/x
  3. Step 3: Cross multiply
    109,871.10x = 165,069.09 × 70,505.10
  4. Step 4: Simplify right side
    109,871.10x = 11,638,212,697.36
  5. Step 5: Solve for x
    x = 11,638,212,697.36/109,871.10
  6. Step 6: Final answer
    x = 105,926.06

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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.