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Finding the Fourth Proportional to 85,719.98, 128,588.42 and 29,552.68

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Solution

The fourth proportional to 85,719.98, 128,588.42 and 29,552.68 is: 44,331.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,719.98 : 128,588.42 = 29,552.68 : x
  2. Step 2: Convert to fraction form
    85,719.98/128,588.42 = 29,552.68/x
  3. Step 3: Cross multiply
    85,719.98x = 128,588.42 × 29,552.68
  4. Step 4: Simplify right side
    85,719.98x = 3,800,132,427.97
  5. Step 5: Solve for x
    x = 3,800,132,427.97/85,719.98
  6. Step 6: Final answer
    x = 44,331.93

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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.