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Finding the Fourth Proportional to 85,617.76, 128,440.92 and 29,455.60

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Solution

The fourth proportional to 85,617.76, 128,440.92 and 29,455.60 is: 44,188.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,617.76 : 128,440.92 = 29,455.60 : x
  2. Step 2: Convert to fraction form
    85,617.76/128,440.92 = 29,455.60/x
  3. Step 3: Cross multiply
    85,617.76x = 128,440.92 × 29,455.60
  4. Step 4: Simplify right side
    85,617.76x = 3,783,304,363.15
  5. Step 5: Solve for x
    x = 3,783,304,363.15/85,617.76
  6. Step 6: Final answer
    x = 44,188.31

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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.