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Finding the Fourth Proportional to 85,603.15, 128,395 and 33,008.23

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Solution

The fourth proportional to 85,603.15, 128,395 and 33,008.23 is: 49,508.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,603.15 : 128,395 = 33,008.23 : x
  2. Step 2: Convert to fraction form
    85,603.15/128,395 = 33,008.23/x
  3. Step 3: Cross multiply
    85,603.15x = 128,395 × 33,008.23
  4. Step 4: Simplify right side
    85,603.15x = 4,238,091,690.85
  5. Step 5: Solve for x
    x = 4,238,091,690.85/85,603.15
  6. Step 6: Final answer
    x = 49,508.60

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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.