Home / 129,697.31-179,065.58-81,365.49

Finding the Fourth Proportional to 129,697.31, 179,065.58 and 81,365.49

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Solution

The fourth proportional to 129,697.31, 179,065.58 and 81,365.49 is: 112,336.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,697.31 : 179,065.58 = 81,365.49 : x
  2. Step 2: Convert to fraction form
    129,697.31/179,065.58 = 81,365.49/x
  3. Step 3: Cross multiply
    129,697.31x = 179,065.58 × 81,365.49
  4. Step 4: Simplify right side
    129,697.31x = 14,569,758,252.01
  5. Step 5: Solve for x
    x = 14,569,758,252.01/129,697.31
  6. Step 6: Final answer
    x = 112,336.62

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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.