Home / 138,580.03-191,240.90-74,918.28

Finding the Fourth Proportional to 138,580.03, 191,240.90 and 74,918.28

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Solution

The fourth proportional to 138,580.03, 191,240.90 and 74,918.28 is: 103,387.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,580.03 : 191,240.90 = 74,918.28 : x
  2. Step 2: Convert to fraction form
    138,580.03/191,240.90 = 74,918.28/x
  3. Step 3: Cross multiply
    138,580.03x = 191,240.90 × 74,918.28
  4. Step 4: Simplify right side
    138,580.03x = 14,327,439,917.16
  5. Step 5: Solve for x
    x = 14,327,439,917.16/138,580.03
  6. Step 6: Final answer
    x = 103,387.48

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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.