Home / 86,945.06-119,779.34-81,713.68

Finding the Fourth Proportional to 86,945.06, 119,779.34 and 81,713.68

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Solution

The fourth proportional to 86,945.06, 119,779.34 and 81,713.68 is: 112,572.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,945.06 : 119,779.34 = 81,713.68 : x
  2. Step 2: Convert to fraction form
    86,945.06/119,779.34 = 81,713.68/x
  3. Step 3: Cross multiply
    86,945.06x = 119,779.34 × 81,713.68
  4. Step 4: Simplify right side
    86,945.06x = 9,787,610,400.53
  5. Step 5: Solve for x
    x = 9,787,610,400.53/86,945.06
  6. Step 6: Final answer
    x = 112,572.36

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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.