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Finding the Fourth Proportional to 122,354.60, 183,531.90 and 103,692.20

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Solution

The fourth proportional to 122,354.60, 183,531.90 and 103,692.20 is: 155,538.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,354.60 : 183,531.90 = 103,692.20 : x
  2. Step 2: Convert to fraction form
    122,354.60/183,531.90 = 103,692.20/x
  3. Step 3: Cross multiply
    122,354.60x = 183,531.90 × 103,692.20
  4. Step 4: Simplify right side
    122,354.60x = 19,030,826,481.18
  5. Step 5: Solve for x
    x = 19,030,826,481.18/122,354.60
  6. Step 6: Final answer
    x = 155,538.30

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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.