Home / 112,969.08-155,899.08-80,711.64

Finding the Fourth Proportional to 112,969.08, 155,899.08 and 80,711.64

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Solution

The fourth proportional to 112,969.08, 155,899.08 and 80,711.64 is: 111,383.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,969.08 : 155,899.08 = 80,711.64 : x
  2. Step 2: Convert to fraction form
    112,969.08/155,899.08 = 80,711.64/x
  3. Step 3: Cross multiply
    112,969.08x = 155,899.08 × 80,711.64
  4. Step 4: Simplify right side
    112,969.08x = 12,582,870,421.29
  5. Step 5: Solve for x
    x = 12,582,870,421.29/112,969.08
  6. Step 6: Final answer
    x = 111,383.31

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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.