Home / 78,356,401.20-117,534,601.80-65,815,268.40

Finding the Fourth Proportional to 78,356,401.20, 117,534,601.80 and 65,815,268.40

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Solution

The fourth proportional to 78,356,401.20, 117,534,601.80 and 65,815,268.40 is: 98,722,902.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,356,401.20 : 117,534,601.80 = 65,815,268.40 : x
  2. Step 2: Convert to fraction form
    78,356,401.20/117,534,601.80 = 65,815,268.40/x
  3. Step 3: Cross multiply
    78,356,401.20x = 117,534,601.80 × 65,815,268.40
  4. Step 4: Simplify right side
    78,356,401.20x = 7,735,571,363,754,123
  5. Step 5: Solve for x
    x = 7,735,571,363,754,123/78,356,401.20
  6. Step 6: Final answer
    x = 98,722,902.60

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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.