Home / 81,280.79-121,929.39-30,667.13

Finding the Fourth Proportional to 81,280.79, 121,929.39 and 30,667.13

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Solution

The fourth proportional to 81,280.79, 121,929.39 and 30,667.13 is: 46,003.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,280.79 : 121,929.39 = 30,667.13 : x
  2. Step 2: Convert to fraction form
    81,280.79/121,929.39 = 30,667.13/x
  3. Step 3: Cross multiply
    81,280.79x = 121,929.39 × 30,667.13
  4. Step 4: Simplify right side
    81,280.79x = 3,739,223,844.30
  5. Step 5: Solve for x
    x = 3,739,223,844.30/81,280.79
  6. Step 6: Final answer
    x = 46,003.79

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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.