Home / 138,403.47-190,996.79-74,741.27

Finding the Fourth Proportional to 138,403.47, 190,996.79 and 74,741.27

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Solution

The fourth proportional to 138,403.47, 190,996.79 and 74,741.27 is: 103,142.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,403.47 : 190,996.79 = 74,741.27 : x
  2. Step 2: Convert to fraction form
    138,403.47/190,996.79 = 74,741.27/x
  3. Step 3: Cross multiply
    138,403.47x = 190,996.79 × 74,741.27
  4. Step 4: Simplify right side
    138,403.47x = 14,275,341,840.86
  5. Step 5: Solve for x
    x = 14,275,341,840.86/138,403.47
  6. Step 6: Final answer
    x = 103,142.95

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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.