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Finding the Fourth Proportional to 103,950.40, 156,069.60 and 66,740.80

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Solution

The fourth proportional to 103,950.40, 156,069.60 and 66,740.80 is: 100,203.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,950.40 : 156,069.60 = 66,740.80 : x
  2. Step 2: Convert to fraction form
    103,950.40/156,069.60 = 66,740.80/x
  3. Step 3: Cross multiply
    103,950.40x = 156,069.60 × 66,740.80
  4. Step 4: Simplify right side
    103,950.40x = 10,416,209,959.68
  5. Step 5: Solve for x
    x = 10,416,209,959.68/103,950.40
  6. Step 6: Final answer
    x = 100,203.65

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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.