Home / 81,036.32-121,609.15-28,446.26

Finding the Fourth Proportional to 81,036.32, 121,609.15 and 28,446.26

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Solution

The fourth proportional to 81,036.32, 121,609.15 and 28,446.26 is: 42,688.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,036.32 : 121,609.15 = 28,446.26 : x
  2. Step 2: Convert to fraction form
    81,036.32/121,609.15 = 28,446.26/x
  3. Step 3: Cross multiply
    81,036.32x = 121,609.15 × 28,446.26
  4. Step 4: Simplify right side
    81,036.32x = 3,459,324,820.12
  5. Step 5: Solve for x
    x = 3,459,324,820.12/81,036.32
  6. Step 6: Final answer
    x = 42,688.58

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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.