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Finding the Fourth Proportional to 363,980.40, 545,986.80 and 124,090.80

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Solution

The fourth proportional to 363,980.40, 545,986.80 and 124,090.80 is: 186,141.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,980.40 : 545,986.80 = 124,090.80 : x
  2. Step 2: Convert to fraction form
    363,980.40/545,986.80 = 124,090.80/x
  3. Step 3: Cross multiply
    363,980.40x = 545,986.80 × 124,090.80
  4. Step 4: Simplify right side
    363,980.40x = 67,751,938,801.44
  5. Step 5: Solve for x
    x = 67,751,938,801.44/363,980.40
  6. Step 6: Final answer
    x = 186,141.72

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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.