Home / 78,728,570.92-117,997,115.10-55,706,139.64

Finding the Fourth Proportional to 78,728,570.92, 117,997,115.10 and 55,706,139.64

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Solution

The fourth proportional to 78,728,570.92, 117,997,115.10 and 55,706,139.64 is: 83,491,465.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,728,570.92 : 117,997,115.10 = 55,706,139.64 : x
  2. Step 2: Convert to fraction form
    78,728,570.92/117,997,115.10 = 55,706,139.64/x
  3. Step 3: Cross multiply
    78,728,570.92x = 117,997,115.10 × 55,706,139.64
  4. Step 4: Simplify right side
    78,728,570.92x = 6,573,163,770,877,752
  5. Step 5: Solve for x
    x = 6,573,163,770,877,752/78,728,570.92
  6. Step 6: Final answer
    x = 83,491,465.60

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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.