Home / 112,684.20-155,338.32-85,779.72

Finding the Fourth Proportional to 112,684.20, 155,338.32 and 85,779.72

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Solution

The fourth proportional to 112,684.20, 155,338.32 and 85,779.72 is: 118,249.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,684.20 : 155,338.32 = 85,779.72 : x
  2. Step 2: Convert to fraction form
    112,684.20/155,338.32 = 85,779.72/x
  3. Step 3: Cross multiply
    112,684.20x = 155,338.32 × 85,779.72
  4. Step 4: Simplify right side
    112,684.20x = 13,324,877,594.87
  5. Step 5: Solve for x
    x = 13,324,877,594.87/112,684.20
  6. Step 6: Final answer
    x = 118,249.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.