Home / 99,730.91-137,628.35-54,408.57

Finding the Fourth Proportional to 99,730.91, 137,628.35 and 54,408.57

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Solution

The fourth proportional to 99,730.91, 137,628.35 and 54,408.57 is: 75,083.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,730.91 : 137,628.35 = 54,408.57 : x
  2. Step 2: Convert to fraction form
    99,730.91/137,628.35 = 54,408.57/x
  3. Step 3: Cross multiply
    99,730.91x = 137,628.35 × 54,408.57
  4. Step 4: Simplify right side
    99,730.91x = 7,488,161,457.15
  5. Step 5: Solve for x
    x = 7,488,161,457.15/99,730.91
  6. Step 6: Final answer
    x = 75,083.66

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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.