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Finding the Fourth Proportional to 85,371.43, 128,024.33 and 58,996.21

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Solution

The fourth proportional to 85,371.43, 128,024.33 and 58,996.21 is: 88,471.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,371.43 : 128,024.33 = 58,996.21 : x
  2. Step 2: Convert to fraction form
    85,371.43/128,024.33 = 58,996.21/x
  3. Step 3: Cross multiply
    85,371.43x = 128,024.33 × 58,996.21
  4. Step 4: Simplify right side
    85,371.43x = 7,552,949,962.81
  5. Step 5: Solve for x
    x = 7,552,949,962.81/85,371.43
  6. Step 6: Final answer
    x = 88,471.63

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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.