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Finding the Fourth Proportional to 104,028.32, 155,971.76 and 40,808.80

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Solution

The fourth proportional to 104,028.32, 155,971.76 and 40,808.80 is: 61,185.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,028.32 : 155,971.76 = 40,808.80 : x
  2. Step 2: Convert to fraction form
    104,028.32/155,971.76 = 40,808.80/x
  3. Step 3: Cross multiply
    104,028.32x = 155,971.76 × 40,808.80
  4. Step 4: Simplify right side
    104,028.32x = 6,365,020,359.49
  5. Step 5: Solve for x
    x = 6,365,020,359.49/104,028.32
  6. Step 6: Final answer
    x = 61,185.46

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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.