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Finding the Fourth Proportional to 318,164.60, 477,235.92 and 81,509.60

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Solution

The fourth proportional to 318,164.60, 477,235.92 and 81,509.60 is: 122,261.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,164.60 : 477,235.92 = 81,509.60 : x
  2. Step 2: Convert to fraction form
    318,164.60/477,235.92 = 81,509.60/x
  3. Step 3: Cross multiply
    318,164.60x = 477,235.92 × 81,509.60
  4. Step 4: Simplify right side
    318,164.60x = 38,899,308,944.83
  5. Step 5: Solve for x
    x = 38,899,308,944.83/318,164.60
  6. Step 6: Final answer
    x = 122,261.59

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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.