Home / 68,780.12-103,638.86-56,573.60

Finding the Fourth Proportional to 68,780.12, 103,638.86 and 56,573.60

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Solution

The fourth proportional to 68,780.12, 103,638.86 and 56,573.60 is: 85,245.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,780.12 : 103,638.86 = 56,573.60 : x
  2. Step 2: Convert to fraction form
    68,780.12/103,638.86 = 56,573.60/x
  3. Step 3: Cross multiply
    68,780.12x = 103,638.86 × 56,573.60
  4. Step 4: Simplify right side
    68,780.12x = 5,863,223,410.10
  5. Step 5: Solve for x
    x = 5,863,223,410.10/68,780.12
  6. Step 6: Final answer
    x = 85,245.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.