Home / 86,943.36-120,034.80-81,582.24

Finding the Fourth Proportional to 86,943.36, 120,034.80 and 81,582.24

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Solution

The fourth proportional to 86,943.36, 120,034.80 and 81,582.24 is: 112,633.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,943.36 : 120,034.80 = 81,582.24 : x
  2. Step 2: Convert to fraction form
    86,943.36/120,034.80 = 81,582.24/x
  3. Step 3: Cross multiply
    86,943.36x = 120,034.80 × 81,582.24
  4. Step 4: Simplify right side
    86,943.36x = 9,792,707,861.95
  5. Step 5: Solve for x
    x = 9,792,707,861.95/86,943.36
  6. Step 6: Final answer
    x = 112,633.19

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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.