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Finding the Fourth Proportional to 85,236, 127,878.30 and 29,088.60

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Solution

The fourth proportional to 85,236, 127,878.30 and 29,088.60 is: 43,641.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,236 : 127,878.30 = 29,088.60 : x
  2. Step 2: Convert to fraction form
    85,236/127,878.30 = 29,088.60/x
  3. Step 3: Cross multiply
    85,236x = 127,878.30 × 29,088.60
  4. Step 4: Simplify right side
    85,236x = 3,719,800,717.38
  5. Step 5: Solve for x
    x = 3,719,800,717.38/85,236
  6. Step 6: Final answer
    x = 43,641.19

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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.