Home / 78,003,425.20-117,005,137.80-65,462,292.40

Finding the Fourth Proportional to 78,003,425.20, 117,005,137.80 and 65,462,292.40

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Solution

The fourth proportional to 78,003,425.20, 117,005,137.80 and 65,462,292.40 is: 98,193,438.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,003,425.20 : 117,005,137.80 = 65,462,292.40 : x
  2. Step 2: Convert to fraction form
    78,003,425.20/117,005,137.80 = 65,462,292.40/x
  3. Step 3: Cross multiply
    78,003,425.20x = 117,005,137.80 × 65,462,292.40
  4. Step 4: Simplify right side
    78,003,425.20x = 7,659,424,542,965,892
  5. Step 5: Solve for x
    x = 7,659,424,542,965,892/78,003,425.20
  6. Step 6: Final answer
    x = 98,193,438.60

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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.