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Finding the Fourth Proportional to 99,799.76, 137,718.60 and 55,079.12

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Solution

The fourth proportional to 99,799.76, 137,718.60 and 55,079.12 is: 76,006.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,799.76 : 137,718.60 = 55,079.12 : x
  2. Step 2: Convert to fraction form
    99,799.76/137,718.60 = 55,079.12/x
  3. Step 3: Cross multiply
    99,799.76x = 137,718.60 × 55,079.12
  4. Step 4: Simplify right side
    99,799.76x = 7,585,419,295.63
  5. Step 5: Solve for x
    x = 7,585,419,295.63/99,799.76
  6. Step 6: Final answer
    x = 76,006.39

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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.