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Finding the Fourth Proportional to 100,480.63, 138,674.31 and 57,464.13

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Solution

The fourth proportional to 100,480.63, 138,674.31 and 57,464.13 is: 79,306.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,480.63 : 138,674.31 = 57,464.13 : x
  2. Step 2: Convert to fraction form
    100,480.63/138,674.31 = 57,464.13/x
  3. Step 3: Cross multiply
    100,480.63x = 138,674.31 × 57,464.13
  4. Step 4: Simplify right side
    100,480.63x = 7,968,798,577.50
  5. Step 5: Solve for x
    x = 7,968,798,577.50/100,480.63
  6. Step 6: Final answer
    x = 79,306.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.