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Finding the Fourth Proportional to 85,781.98, 128,497.92 and 44,141.50

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Solution

The fourth proportional to 85,781.98, 128,497.92 and 44,141.50 is: 66,122.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,781.98 : 128,497.92 = 44,141.50 : x
  2. Step 2: Convert to fraction form
    85,781.98/128,497.92 = 44,141.50/x
  3. Step 3: Cross multiply
    85,781.98x = 128,497.92 × 44,141.50
  4. Step 4: Simplify right side
    85,781.98x = 5,672,090,935.68
  5. Step 5: Solve for x
    x = 5,672,090,935.68/85,781.98
  6. Step 6: Final answer
    x = 66,122.17

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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.