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Finding the Fourth Proportional to 84,780.98, 117,009.92 and 50,790.90

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Solution

The fourth proportional to 84,780.98, 117,009.92 and 50,790.90 is: 70,098.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,780.98 : 117,009.92 = 50,790.90 : x
  2. Step 2: Convert to fraction form
    84,780.98/117,009.92 = 50,790.90/x
  3. Step 3: Cross multiply
    84,780.98x = 117,009.92 × 50,790.90
  4. Step 4: Simplify right side
    84,780.98x = 5,943,038,767.61
  5. Step 5: Solve for x
    x = 5,943,038,767.61/84,780.98
  6. Step 6: Final answer
    x = 70,098.73

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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.