Home / 112,430.26-154,890.30-78,376.87

Finding the Fourth Proportional to 112,430.26, 154,890.30 and 78,376.87

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Solution

The fourth proportional to 112,430.26, 154,890.30 and 78,376.87 is: 107,976.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,430.26 : 154,890.30 = 78,376.87 : x
  2. Step 2: Convert to fraction form
    112,430.26/154,890.30 = 78,376.87/x
  3. Step 3: Cross multiply
    112,430.26x = 154,890.30 × 78,376.87
  4. Step 4: Simplify right side
    112,430.26x = 12,139,816,907.36
  5. Step 5: Solve for x
    x = 12,139,816,907.36/112,430.26
  6. Step 6: Final answer
    x = 107,976.42

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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.