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Finding the Fourth Proportional to 102,692.20, 153,819.60 and 83,009.20

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Solution

The fourth proportional to 102,692.20, 153,819.60 and 83,009.20 is: 124,337.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,692.20 : 153,819.60 = 83,009.20 : x
  2. Step 2: Convert to fraction form
    102,692.20/153,819.60 = 83,009.20/x
  3. Step 3: Cross multiply
    102,692.20x = 153,819.60 × 83,009.20
  4. Step 4: Simplify right side
    102,692.20x = 12,768,441,940.32
  5. Step 5: Solve for x
    x = 12,768,441,940.32/102,692.20
  6. Step 6: Final answer
    x = 124,337.02

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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.