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Finding the Fourth Proportional to 363,642.48, 545,712.72 and 126,985.20

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Solution

The fourth proportional to 363,642.48, 545,712.72 and 126,985.20 is: 190,564.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,642.48 : 545,712.72 = 126,985.20 : x
  2. Step 2: Convert to fraction form
    363,642.48/545,712.72 = 126,985.20/x
  3. Step 3: Cross multiply
    363,642.48x = 545,712.72 × 126,985.20
  4. Step 4: Simplify right side
    363,642.48x = 69,297,438,891.74
  5. Step 5: Solve for x
    x = 69,297,438,891.74/363,642.48
  6. Step 6: Final answer
    x = 190,564.75

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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.