Home / 90,640,317.10-135,960,475.65-78,310,885.90

Finding the Fourth Proportional to 90,640,317.10, 135,960,475.65 and 78,310,885.90

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Solution

The fourth proportional to 90,640,317.10, 135,960,475.65 and 78,310,885.90 is: 117,466,328.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,640,317.10 : 135,960,475.65 = 78,310,885.90 : x
  2. Step 2: Convert to fraction form
    90,640,317.10/135,960,475.65 = 78,310,885.90/x
  3. Step 3: Cross multiply
    90,640,317.10x = 135,960,475.65 × 78,310,885.90
  4. Step 4: Simplify right side
    90,640,317.10x = 10,647,185,295,536,880
  5. Step 5: Solve for x
    x = 10,647,185,295,536,880/90,640,317.10
  6. Step 6: Final answer
    x = 117,466,328.85

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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.