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Finding the Fourth Proportional to 318,162.60, 477,232.92 and 81,507.60

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Solution

The fourth proportional to 318,162.60, 477,232.92 and 81,507.60 is: 122,258.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,162.60 : 477,232.92 = 81,507.60 : x
  2. Step 2: Convert to fraction form
    318,162.60/477,232.92 = 81,507.60/x
  3. Step 3: Cross multiply
    318,162.60x = 477,232.92 × 81,507.60
  4. Step 4: Simplify right side
    318,162.60x = 38,898,109,950.19
  5. Step 5: Solve for x
    x = 38,898,109,950.19/318,162.60
  6. Step 6: Final answer
    x = 122,258.59

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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.