Home / 85,612.96-128,396.40-30,201.76

Finding the Fourth Proportional to 85,612.96, 128,396.40 and 30,201.76

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Solution

The fourth proportional to 85,612.96, 128,396.40 and 30,201.76 is: 45,294.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,612.96 : 128,396.40 = 30,201.76 : x
  2. Step 2: Convert to fraction form
    85,612.96/128,396.40 = 30,201.76/x
  3. Step 3: Cross multiply
    85,612.96x = 128,396.40 × 30,201.76
  4. Step 4: Simplify right side
    85,612.96x = 3,877,797,257.66
  5. Step 5: Solve for x
    x = 3,877,797,257.66/85,612.96
  6. Step 6: Final answer
    x = 45,294.51

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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.