Home / 81,149.39-121,558.69-38,900.65

Finding the Fourth Proportional to 81,149.39, 121,558.69 and 38,900.65

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Solution

The fourth proportional to 81,149.39, 121,558.69 and 38,900.65 is: 58,271.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,149.39 : 121,558.69 = 38,900.65 : x
  2. Step 2: Convert to fraction form
    81,149.39/121,558.69 = 38,900.65/x
  3. Step 3: Cross multiply
    81,149.39x = 121,558.69 × 38,900.65
  4. Step 4: Simplify right side
    81,149.39x = 4,728,711,653.00
  5. Step 5: Solve for x
    x = 4,728,711,653.00/81,149.39
  6. Step 6: Final answer
    x = 58,271.69

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1.5x scale

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.