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Finding the Fourth Proportional to 386,360.96, 579,639.85 and 120,123.68

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Solution

The fourth proportional to 386,360.96, 579,639.85 and 120,123.68 is: 180,216.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,360.96 : 579,639.85 = 120,123.68 : x
  2. Step 2: Convert to fraction form
    386,360.96/579,639.85 = 120,123.68/x
  3. Step 3: Cross multiply
    386,360.96x = 579,639.85 × 120,123.68
  4. Step 4: Simplify right side
    386,360.96x = 69,628,468,658.14
  5. Step 5: Solve for x
    x = 69,628,468,658.14/386,360.96
  6. Step 6: Final answer
    x = 180,216.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.