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Finding the Fourth Proportional to 85,262.40, 128,047.20 and 82,497.60

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Solution

The fourth proportional to 85,262.40, 128,047.20 and 82,497.60 is: 123,895.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,262.40 : 128,047.20 = 82,497.60 : x
  2. Step 2: Convert to fraction form
    85,262.40/128,047.20 = 82,497.60/x
  3. Step 3: Cross multiply
    85,262.40x = 128,047.20 × 82,497.60
  4. Step 4: Simplify right side
    85,262.40x = 10,563,586,686.72
  5. Step 5: Solve for x
    x = 10,563,586,686.72/85,262.40
  6. Step 6: Final answer
    x = 123,895.02

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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.