Home / 81,782.48-112,843.12-47,784.40

Finding the Fourth Proportional to 81,782.48, 112,843.12 and 47,784.40

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Solution

The fourth proportional to 81,782.48, 112,843.12 and 47,784.40 is: 65,932.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,782.48 : 112,843.12 = 47,784.40 : x
  2. Step 2: Convert to fraction form
    81,782.48/112,843.12 = 47,784.40/x
  3. Step 3: Cross multiply
    81,782.48x = 112,843.12 × 47,784.40
  4. Step 4: Simplify right side
    81,782.48x = 5,392,140,278.84
  5. Step 5: Solve for x
    x = 5,392,140,278.84/81,782.48
  6. Step 6: Final answer
    x = 65,932.71

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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.