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Finding the Fourth Proportional to 123,933.60, 185,900.40 and 77,212.80

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Solution

The fourth proportional to 123,933.60, 185,900.40 and 77,212.80 is: 115,819.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,933.60 : 185,900.40 = 77,212.80 : x
  2. Step 2: Convert to fraction form
    123,933.60/185,900.40 = 77,212.80/x
  3. Step 3: Cross multiply
    123,933.60x = 185,900.40 × 77,212.80
  4. Step 4: Simplify right side
    123,933.60x = 14,353,890,405.12
  5. Step 5: Solve for x
    x = 14,353,890,405.12/123,933.60
  6. Step 6: Final answer
    x = 115,819.20

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1.5x scale

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.