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Finding the Fourth Proportional to 85,810.60, 128,639.10 and 33,202.60

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Solution

The fourth proportional to 85,810.60, 128,639.10 and 33,202.60 is: 49,774.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,810.60 : 128,639.10 = 33,202.60 : x
  2. Step 2: Convert to fraction form
    85,810.60/128,639.10 = 33,202.60/x
  3. Step 3: Cross multiply
    85,810.60x = 128,639.10 × 33,202.60
  4. Step 4: Simplify right side
    85,810.60x = 4,271,152,581.66
  5. Step 5: Solve for x
    x = 4,271,152,581.66/85,810.60
  6. Step 6: Final answer
    x = 49,774.18

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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.