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Finding the Fourth Proportional to 51,156.48, 76,745.70 and 28,980.48

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Solution

The fourth proportional to 51,156.48, 76,745.70 and 28,980.48 is: 43,476.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,156.48 : 76,745.70 = 28,980.48 : x
  2. Step 2: Convert to fraction form
    51,156.48/76,745.70 = 28,980.48/x
  3. Step 3: Cross multiply
    51,156.48x = 76,745.70 × 28,980.48
  4. Step 4: Simplify right side
    51,156.48x = 2,224,127,223.94
  5. Step 5: Solve for x
    x = 2,224,127,223.94/51,156.48
  6. Step 6: Final answer
    x = 43,476.94

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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.