Home / 78,642,002.80-117,963,004.20-51,432,223.60

Finding the Fourth Proportional to 78,642,002.80, 117,963,004.20 and 51,432,223.60

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Solution

The fourth proportional to 78,642,002.80, 117,963,004.20 and 51,432,223.60 is: 77,148,335.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,642,002.80 : 117,963,004.20 = 51,432,223.60 : x
  2. Step 2: Convert to fraction form
    78,642,002.80/117,963,004.20 = 51,432,223.60/x
  3. Step 3: Cross multiply
    78,642,002.80x = 117,963,004.20 × 51,432,223.60
  4. Step 4: Simplify right side
    78,642,002.80x = 6,067,099,608,542,139
  5. Step 5: Solve for x
    x = 6,067,099,608,542,139/78,642,002.80
  6. Step 6: Final answer
    x = 77,148,335.40

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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.