Home / 81,111.49-121,667.23-30,520.02

Finding the Fourth Proportional to 81,111.49, 121,667.23 and 30,520.02

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Solution

The fourth proportional to 81,111.49, 121,667.23 and 30,520.02 is: 45,780.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,111.49 : 121,667.23 = 30,520.02 : x
  2. Step 2: Convert to fraction form
    81,111.49/121,667.23 = 30,520.02/x
  3. Step 3: Cross multiply
    81,111.49x = 121,667.23 × 30,520.02
  4. Step 4: Simplify right side
    81,111.49x = 3,713,286,444.51
  5. Step 5: Solve for x
    x = 3,713,286,444.51/81,111.49
  6. Step 6: Final answer
    x = 45,780.03

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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.