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Finding the Fourth Proportional to 85,130.98, 127,652.72 and 45,721.24

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Solution

The fourth proportional to 85,130.98, 127,652.72 and 45,721.24 is: 68,558.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,130.98 : 127,652.72 = 45,721.24 : x
  2. Step 2: Convert to fraction form
    85,130.98/127,652.72 = 45,721.24/x
  3. Step 3: Cross multiply
    85,130.98x = 127,652.72 × 45,721.24
  4. Step 4: Simplify right side
    85,130.98x = 5,836,440,647.77
  5. Step 5: Solve for x
    x = 5,836,440,647.77/85,130.98
  6. Step 6: Final answer
    x = 68,558.36

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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.