Home / 78,807,863.20-118,211,794.80-71,155,112.80

Finding the Fourth Proportional to 78,807,863.20, 118,211,794.80 and 71,155,112.80

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Solution

The fourth proportional to 78,807,863.20, 118,211,794.80 and 71,155,112.80 is: 106,732,669.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,807,863.20 : 118,211,794.80 = 71,155,112.80 : x
  2. Step 2: Convert to fraction form
    78,807,863.20/118,211,794.80 = 71,155,112.80/x
  3. Step 3: Cross multiply
    78,807,863.20x = 118,211,794.80 × 71,155,112.80
  4. Step 4: Simplify right side
    78,807,863.20x = 8,411,373,593,284,453
  5. Step 5: Solve for x
    x = 8,411,373,593,284,453/78,807,863.20
  6. Step 6: Final answer
    x = 106,732,669.20

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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.