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Finding the Fourth Proportional to 158,404.21, 218,595.95 and 85,805.73

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Solution

The fourth proportional to 158,404.21, 218,595.95 and 85,805.73 is: 118,410.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,404.21 : 218,595.95 = 85,805.73 : x
  2. Step 2: Convert to fraction form
    158,404.21/218,595.95 = 85,805.73/x
  3. Step 3: Cross multiply
    158,404.21x = 218,595.95 × 85,805.73
  4. Step 4: Simplify right side
    158,404.21x = 18,756,785,064.79
  5. Step 5: Solve for x
    x = 18,756,785,064.79/158,404.21
  6. Step 6: Final answer
    x = 118,410.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.