Home / 135,411.26-186,866.24-78,029.50

Finding the Fourth Proportional to 135,411.26, 186,866.24 and 78,029.50

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Solution

The fourth proportional to 135,411.26, 186,866.24 and 78,029.50 is: 107,679.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,411.26 : 186,866.24 = 78,029.50 : x
  2. Step 2: Convert to fraction form
    135,411.26/186,866.24 = 78,029.50/x
  3. Step 3: Cross multiply
    135,411.26x = 186,866.24 × 78,029.50
  4. Step 4: Simplify right side
    135,411.26x = 14,581,079,274.08
  5. Step 5: Solve for x
    x = 14,581,079,274.08/135,411.26
  6. Step 6: Final answer
    x = 107,679.96

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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.