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Finding the Fourth Proportional to 113,606.90, 170,410.35 and 80,429.30

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Solution

The fourth proportional to 113,606.90, 170,410.35 and 80,429.30 is: 120,643.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,606.90 : 170,410.35 = 80,429.30 : x
  2. Step 2: Convert to fraction form
    113,606.90/170,410.35 = 80,429.30/x
  3. Step 3: Cross multiply
    113,606.90x = 170,410.35 × 80,429.30
  4. Step 4: Simplify right side
    113,606.90x = 13,705,985,163.26
  5. Step 5: Solve for x
    x = 13,705,985,163.26/113,606.90
  6. Step 6: Final answer
    x = 120,643.95

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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.