Home / 138,629.49-191,308.74-74,967.30

Finding the Fourth Proportional to 138,629.49, 191,308.74 and 74,967.30

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Solution

The fourth proportional to 138,629.49, 191,308.74 and 74,967.30 is: 103,454.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,629.49 : 191,308.74 = 74,967.30 : x
  2. Step 2: Convert to fraction form
    138,629.49/191,308.74 = 74,967.30/x
  3. Step 3: Cross multiply
    138,629.49x = 191,308.74 × 74,967.30
  4. Step 4: Simplify right side
    138,629.49x = 14,341,899,704.20
  5. Step 5: Solve for x
    x = 14,341,899,704.20/138,629.49
  6. Step 6: Final answer
    x = 103,454.90

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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.