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Finding the Fourth Proportional to 87,804, 121,134.42 and 51,980.94

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Solution

The fourth proportional to 87,804, 121,134.42 and 51,980.94 is: 71,712.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,804 : 121,134.42 = 51,980.94 : x
  2. Step 2: Convert to fraction form
    87,804/121,134.42 = 51,980.94/x
  3. Step 3: Cross multiply
    87,804x = 121,134.42 × 51,980.94
  4. Step 4: Simplify right side
    87,804x = 6,296,681,017.95
  5. Step 5: Solve for x
    x = 6,296,681,017.95/87,804
  6. Step 6: Final answer
    x = 71,712.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.