Home / 138,938.78-191,735.72-75,276.58

Finding the Fourth Proportional to 138,938.78, 191,735.72 and 75,276.58

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Solution

The fourth proportional to 138,938.78, 191,735.72 and 75,276.58 is: 103,881.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,938.78 : 191,735.72 = 75,276.58 : x
  2. Step 2: Convert to fraction form
    138,938.78/191,735.72 = 75,276.58/x
  3. Step 3: Cross multiply
    138,938.78x = 191,735.72 × 75,276.58
  4. Step 4: Simplify right side
    138,938.78x = 14,433,209,265.44
  5. Step 5: Solve for x
    x = 14,433,209,265.44/138,938.78
  6. Step 6: Final answer
    x = 103,881.79

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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.