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Finding the Fourth Proportional to 84,780.80, 117,009.68 and 50,790.74

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Solution

The fourth proportional to 84,780.80, 117,009.68 and 50,790.74 is: 70,098.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,780.80 : 117,009.68 = 50,790.74 : x
  2. Step 2: Convert to fraction form
    84,780.80/117,009.68 = 50,790.74/x
  3. Step 3: Cross multiply
    84,780.80x = 117,009.68 × 50,790.74
  4. Step 4: Simplify right side
    84,780.80x = 5,943,007,395.36
  5. Step 5: Solve for x
    x = 5,943,007,395.36/84,780.80
  6. Step 6: Final answer
    x = 70,098.51

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1.5x scale

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.