Home / 78,280,314.20-117,420,471.30-65,620,208.60

Finding the Fourth Proportional to 78,280,314.20, 117,420,471.30 and 65,620,208.60

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Solution

The fourth proportional to 78,280,314.20, 117,420,471.30 and 65,620,208.60 is: 98,430,312.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,280,314.20 : 117,420,471.30 = 65,620,208.60 : x
  2. Step 2: Convert to fraction form
    78,280,314.20/117,420,471.30 = 65,620,208.60/x
  3. Step 3: Cross multiply
    78,280,314.20x = 117,420,471.30 × 65,620,208.60
  4. Step 4: Simplify right side
    78,280,314.20x = 7,705,155,820,616,313
  5. Step 5: Solve for x
    x = 7,705,155,820,616,313/78,280,314.20
  6. Step 6: Final answer
    x = 98,430,312.90

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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.