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Finding the Fourth Proportional to 85,581.21, 128,371.83 and 32,258.74

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Solution

The fourth proportional to 85,581.21, 128,371.83 and 32,258.74 is: 48,388.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,581.21 : 128,371.83 = 32,258.74 : x
  2. Step 2: Convert to fraction form
    85,581.21/128,371.83 = 32,258.74/x
  3. Step 3: Cross multiply
    85,581.21x = 128,371.83 × 32,258.74
  4. Step 4: Simplify right side
    85,581.21x = 4,141,113,487.29
  5. Step 5: Solve for x
    x = 4,141,113,487.29/85,581.21
  6. Step 6: Final answer
    x = 48,388.12

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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.