Home / 81,335.23-121,790.64-65,453.51

Finding the Fourth Proportional to 81,335.23, 121,790.64 and 65,453.51

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Solution

The fourth proportional to 81,335.23, 121,790.64 and 65,453.51 is: 98,009.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,335.23 : 121,790.64 = 65,453.51 : x
  2. Step 2: Convert to fraction form
    81,335.23/121,790.64 = 65,453.51/x
  3. Step 3: Cross multiply
    81,335.23x = 121,790.64 × 65,453.51
  4. Step 4: Simplify right side
    81,335.23x = 7,971,625,177.62
  5. Step 5: Solve for x
    x = 7,971,625,177.62/81,335.23
  6. Step 6: Final answer
    x = 98,009.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.