Home / 78,584,731.20-117,877,096.80-40,320,979.20

Finding the Fourth Proportional to 78,584,731.20, 117,877,096.80 and 40,320,979.20

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Solution

The fourth proportional to 78,584,731.20, 117,877,096.80 and 40,320,979.20 is: 60,481,468.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,584,731.20 : 117,877,096.80 = 40,320,979.20 : x
  2. Step 2: Convert to fraction form
    78,584,731.20/117,877,096.80 = 40,320,979.20/x
  3. Step 3: Cross multiply
    78,584,731.20x = 117,877,096.80 × 40,320,979.20
  4. Step 4: Simplify right side
    78,584,731.20x = 4,752,919,968,229,187
  5. Step 5: Solve for x
    x = 4,752,919,968,229,187/78,584,731.20
  6. Step 6: Final answer
    x = 60,481,468.80

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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.