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Finding the Fourth Proportional to 85,548.81, 128,323.28 and 23,219.31

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Solution

The fourth proportional to 85,548.81, 128,323.28 and 23,219.31 is: 34,828.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,548.81 : 128,323.28 = 23,219.31 : x
  2. Step 2: Convert to fraction form
    85,548.81/128,323.28 = 23,219.31/x
  3. Step 3: Cross multiply
    85,548.81x = 128,323.28 × 23,219.31
  4. Step 4: Simplify right side
    85,548.81x = 2,979,578,018.54
  5. Step 5: Solve for x
    x = 2,979,578,018.54/85,548.81
  6. Step 6: Final answer
    x = 34,828.98

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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.