Home / 99,965.09-137,953.79-54,641.81

Finding the Fourth Proportional to 99,965.09, 137,953.79 and 54,641.81

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Solution

The fourth proportional to 99,965.09, 137,953.79 and 54,641.81 is: 75,406.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,965.09 : 137,953.79 = 54,641.81 : x
  2. Step 2: Convert to fraction form
    99,965.09/137,953.79 = 54,641.81/x
  3. Step 3: Cross multiply
    99,965.09x = 137,953.79 × 54,641.81
  4. Step 4: Simplify right side
    99,965.09x = 7,538,043,818.98
  5. Step 5: Solve for x
    x = 7,538,043,818.98/99,965.09
  6. Step 6: Final answer
    x = 75,406.77

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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.