Home / 81,399.80-112,332.07-47,431.59

Finding the Fourth Proportional to 81,399.80, 112,332.07 and 47,431.59

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Solution

The fourth proportional to 81,399.80, 112,332.07 and 47,431.59 is: 65,455.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,399.80 : 112,332.07 = 47,431.59 : x
  2. Step 2: Convert to fraction form
    81,399.80/112,332.07 = 47,431.59/x
  3. Step 3: Cross multiply
    81,399.80x = 112,332.07 × 47,431.59
  4. Step 4: Simplify right side
    81,399.80x = 5,328,088,217.30
  5. Step 5: Solve for x
    x = 5,328,088,217.30/81,399.80
  6. Step 6: Final answer
    x = 65,455.79

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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.