Home / 81,585.12-112,615.56-51,421.28

Finding the Fourth Proportional to 81,585.12, 112,615.56 and 51,421.28

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Solution

The fourth proportional to 81,585.12, 112,615.56 and 51,421.28 is: 70,979.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,585.12 : 112,615.56 = 51,421.28 : x
  2. Step 2: Convert to fraction form
    81,585.12/112,615.56 = 51,421.28/x
  3. Step 3: Cross multiply
    81,585.12x = 112,615.56 × 51,421.28
  4. Step 4: Simplify right side
    81,585.12x = 5,790,836,243.12
  5. Step 5: Solve for x
    x = 5,790,836,243.12/81,585.12
  6. Step 6: Final answer
    x = 70,979.07

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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.