Home / 78,345,945.60-117,518,918.40-47,689,843.20

Finding the Fourth Proportional to 78,345,945.60, 117,518,918.40 and 47,689,843.20

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Solution

The fourth proportional to 78,345,945.60, 117,518,918.40 and 47,689,843.20 is: 71,534,764.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,345,945.60 : 117,518,918.40 = 47,689,843.20 : x
  2. Step 2: Convert to fraction form
    78,345,945.60/117,518,918.40 = 47,689,843.20/x
  3. Step 3: Cross multiply
    78,345,945.60x = 117,518,918.40 × 47,689,843.20
  4. Step 4: Simplify right side
    78,345,945.60x = 5,604,458,791,529,596
  5. Step 5: Solve for x
    x = 5,604,458,791,529,596/78,345,945.60
  6. Step 6: Final answer
    x = 71,534,764.80

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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.