Home / 121,949.12-168,088.48-81,648.64

Finding the Fourth Proportional to 121,949.12, 168,088.48 and 81,648.64

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Solution

The fourth proportional to 121,949.12, 168,088.48 and 81,648.64 is: 112,540.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,949.12 : 168,088.48 = 81,648.64 : x
  2. Step 2: Convert to fraction form
    121,949.12/168,088.48 = 81,648.64/x
  3. Step 3: Cross multiply
    121,949.12x = 168,088.48 × 81,648.64
  4. Step 4: Simplify right side
    121,949.12x = 13,724,195,791.67
  5. Step 5: Solve for x
    x = 13,724,195,791.67/121,949.12
  6. Step 6: Final answer
    x = 112,540.34

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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.