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Finding the Fourth Proportional to 78,804,946.80, 118,207,420.20 and 48,571,858.80

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Solution

The fourth proportional to 78,804,946.80, 118,207,420.20 and 48,571,858.80 is: 72,857,788.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,804,946.80 : 118,207,420.20 = 48,571,858.80 : x
  2. Step 2: Convert to fraction form
    78,804,946.80/118,207,420.20 = 48,571,858.80/x
  3. Step 3: Cross multiply
    78,804,946.80x = 118,207,420.20 × 48,571,858.80
  4. Step 4: Simplify right side
    78,804,946.80x = 5,741,554,123,066,668
  5. Step 5: Solve for x
    x = 5,741,554,123,066,668/78,804,946.80
  6. Step 6: Final answer
    x = 72,857,788.20

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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.