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Finding the Fourth Proportional to 318,444.15, 477,671.01 and 81,781.59

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Solution

The fourth proportional to 318,444.15, 477,671.01 and 81,781.59 is: 122,673.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,444.15 : 477,671.01 = 81,781.59 : x
  2. Step 2: Convert to fraction form
    318,444.15/477,671.01 = 81,781.59/x
  3. Step 3: Cross multiply
    318,444.15x = 477,671.01 × 81,781.59
  4. Step 4: Simplify right side
    318,444.15x = 39,064,694,694.71
  5. Step 5: Solve for x
    x = 39,064,694,694.71/318,444.15
  6. Step 6: Final answer
    x = 122,673.61

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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.