Home / 81,455.04-112,406.40-53,107.20

Finding the Fourth Proportional to 81,455.04, 112,406.40 and 53,107.20

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Solution

The fourth proportional to 81,455.04, 112,406.40 and 53,107.20 is: 73,286.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,455.04 : 112,406.40 = 53,107.20 : x
  2. Step 2: Convert to fraction form
    81,455.04/112,406.40 = 53,107.20/x
  3. Step 3: Cross multiply
    81,455.04x = 112,406.40 × 53,107.20
  4. Step 4: Simplify right side
    81,455.04x = 5,969,589,166.08
  5. Step 5: Solve for x
    x = 5,969,589,166.08/81,455.04
  6. Step 6: Final answer
    x = 73,286.92

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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.