Home / 81,720.27-112,513.28-69,735.51

Finding the Fourth Proportional to 81,720.27, 112,513.28 and 69,735.51

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Solution

The fourth proportional to 81,720.27, 112,513.28 and 69,735.51 is: 96,012.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,720.27 : 112,513.28 = 69,735.51 : x
  2. Step 2: Convert to fraction form
    81,720.27/112,513.28 = 69,735.51/x
  3. Step 3: Cross multiply
    81,720.27x = 112,513.28 × 69,735.51
  4. Step 4: Simplify right side
    81,720.27x = 7,846,170,962.57
  5. Step 5: Solve for x
    x = 7,846,170,962.57/81,720.27
  6. Step 6: Final answer
    x = 96,012.54

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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.