Home / 81,228.18-112,115.19-65,032.26

Finding the Fourth Proportional to 81,228.18, 112,115.19 and 65,032.26

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Solution

The fourth proportional to 81,228.18, 112,115.19 and 65,032.26 is: 89,760.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,228.18 : 112,115.19 = 65,032.26 : x
  2. Step 2: Convert to fraction form
    81,228.18/112,115.19 = 65,032.26/x
  3. Step 3: Cross multiply
    81,228.18x = 112,115.19 × 65,032.26
  4. Step 4: Simplify right side
    81,228.18x = 7,291,104,186.03
  5. Step 5: Solve for x
    x = 7,291,104,186.03/81,228.18
  6. Step 6: Final answer
    x = 89,760.77

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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.