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Finding the Fourth Proportional to 104,603.40, 156,817.26 and 72,920.34

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Solution

The fourth proportional to 104,603.40, 156,817.26 and 72,920.34 is: 109,319.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,603.40 : 156,817.26 = 72,920.34 : x
  2. Step 2: Convert to fraction form
    104,603.40/156,817.26 = 72,920.34/x
  3. Step 3: Cross multiply
    104,603.40x = 156,817.26 × 72,920.34
  4. Step 4: Simplify right side
    104,603.40x = 11,435,167,917.07
  5. Step 5: Solve for x
    x = 11,435,167,917.07/104,603.40
  6. Step 6: Final answer
    x = 109,319.28

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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.