Home / 78,302,937.60-117,454,406.40-76,959,244.80

Finding the Fourth Proportional to 78,302,937.60, 117,454,406.40 and 76,959,244.80

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Solution

The fourth proportional to 78,302,937.60, 117,454,406.40 and 76,959,244.80 is: 115,438,867.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,302,937.60 : 117,454,406.40 = 76,959,244.80 : x
  2. Step 2: Convert to fraction form
    78,302,937.60/117,454,406.40 = 76,959,244.80/x
  3. Step 3: Cross multiply
    78,302,937.60x = 117,454,406.40 × 76,959,244.80
  4. Step 4: Simplify right side
    78,302,937.60x = 9,039,202,414,976,286
  5. Step 5: Solve for x
    x = 9,039,202,414,976,286/78,302,937.60
  6. Step 6: Final answer
    x = 115,438,867.20

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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.