Home / 138,867.53-191,636.76-75,205.31

Finding the Fourth Proportional to 138,867.53, 191,636.76 and 75,205.31

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Solution

The fourth proportional to 138,867.53, 191,636.76 and 75,205.31 is: 103,783.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,867.53 : 191,636.76 = 75,205.31 : x
  2. Step 2: Convert to fraction form
    138,867.53/191,636.76 = 75,205.31/x
  3. Step 3: Cross multiply
    138,867.53x = 191,636.76 × 75,205.31
  4. Step 4: Simplify right side
    138,867.53x = 14,412,100,985.01
  5. Step 5: Solve for x
    x = 14,412,100,985.01/138,867.53
  6. Step 6: Final answer
    x = 103,783.09

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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.