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Finding the Fourth Proportional to 99,490.74, 137,293.80 and 54,167.94

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Solution

The fourth proportional to 99,490.74, 137,293.80 and 54,167.94 is: 74,749.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,490.74 : 137,293.80 = 54,167.94 : x
  2. Step 2: Convert to fraction form
    99,490.74/137,293.80 = 54,167.94/x
  3. Step 3: Cross multiply
    99,490.74x = 137,293.80 × 54,167.94
  4. Step 4: Simplify right side
    99,490.74x = 7,436,922,320.77
  5. Step 5: Solve for x
    x = 7,436,922,320.77/99,490.74
  6. Step 6: Final answer
    x = 74,749.89

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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.