Home / 112,339,939.20-168,509,908.80-78,299,721.60

Finding the Fourth Proportional to 112,339,939.20, 168,509,908.80 and 78,299,721.60

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Solution

The fourth proportional to 112,339,939.20, 168,509,908.80 and 78,299,721.60 is: 117,449,582.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,339,939.20 : 168,509,908.80 = 78,299,721.60 : x
  2. Step 2: Convert to fraction form
    112,339,939.20/168,509,908.80 = 78,299,721.60/x
  3. Step 3: Cross multiply
    112,339,939.20x = 168,509,908.80 × 78,299,721.60
  4. Step 4: Simplify right side
    112,339,939.20x = 13,194,278,945,881,390
  5. Step 5: Solve for x
    x = 13,194,278,945,881,390/112,339,939.20
  6. Step 6: Final answer
    x = 117,449,582.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.