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Finding the Fourth Proportional to 121,286.10, 181,929.15 and 113,412.90

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Solution

The fourth proportional to 121,286.10, 181,929.15 and 113,412.90 is: 170,119.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,286.10 : 181,929.15 = 113,412.90 : x
  2. Step 2: Convert to fraction form
    121,286.10/181,929.15 = 113,412.90/x
  3. Step 3: Cross multiply
    121,286.10x = 181,929.15 × 113,412.90
  4. Step 4: Simplify right side
    121,286.10x = 20,633,112,496.04
  5. Step 5: Solve for x
    x = 20,633,112,496.04/121,286.10
  6. Step 6: Final answer
    x = 170,119.35

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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.