Home / 99,579.45-137,417.90-54,257.81

Finding the Fourth Proportional to 99,579.45, 137,417.90 and 54,257.81

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Solution

The fourth proportional to 99,579.45, 137,417.90 and 54,257.81 is: 74,874.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,579.45 : 137,417.90 = 54,257.81 : x
  2. Step 2: Convert to fraction form
    99,579.45/137,417.90 = 54,257.81/x
  3. Step 3: Cross multiply
    99,579.45x = 137,417.90 × 54,257.81
  4. Step 4: Simplify right side
    99,579.45x = 7,455,994,100.90
  5. Step 5: Solve for x
    x = 7,455,994,100.90/99,579.45
  6. Step 6: Final answer
    x = 74,874.83

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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.