Home / 137,171.07-189,291.74-76,742.78

Finding the Fourth Proportional to 137,171.07, 189,291.74 and 76,742.78

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Solution

The fourth proportional to 137,171.07, 189,291.74 and 76,742.78 is: 105,902.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,171.07 : 189,291.74 = 76,742.78 : x
  2. Step 2: Convert to fraction form
    137,171.07/189,291.74 = 76,742.78/x
  3. Step 3: Cross multiply
    137,171.07x = 189,291.74 × 76,742.78
  4. Step 4: Simplify right side
    137,171.07x = 14,526,773,028.46
  5. Step 5: Solve for x
    x = 14,526,773,028.46/137,171.07
  6. Step 6: Final answer
    x = 105,902.60

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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.