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Finding the Fourth Proportional to 109,425.70, 164,041.35 and 72,003.70

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Solution

The fourth proportional to 109,425.70, 164,041.35 and 72,003.70 is: 107,941.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,425.70 : 164,041.35 = 72,003.70 : x
  2. Step 2: Convert to fraction form
    109,425.70/164,041.35 = 72,003.70/x
  3. Step 3: Cross multiply
    109,425.70x = 164,041.35 × 72,003.70
  4. Step 4: Simplify right side
    109,425.70x = 11,811,584,153.00
  5. Step 5: Solve for x
    x = 11,811,584,153.00/109,425.70
  6. Step 6: Final answer
    x = 107,941.59

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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.