Home / 138,403.50-190,996.84-74,741.30

Finding the Fourth Proportional to 138,403.50, 190,996.84 and 74,741.30

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Solution

The fourth proportional to 138,403.50, 190,996.84 and 74,741.30 is: 103,143.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,403.50 : 190,996.84 = 74,741.30 : x
  2. Step 2: Convert to fraction form
    138,403.50/190,996.84 = 74,741.30/x
  3. Step 3: Cross multiply
    138,403.50x = 190,996.84 × 74,741.30
  4. Step 4: Simplify right side
    138,403.50x = 14,275,351,743.79
  5. Step 5: Solve for x
    x = 14,275,351,743.79/138,403.50
  6. Step 6: Final answer
    x = 103,143.00

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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.