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Finding the Fourth Proportional to 408,551.48, 612,925.64 and 128,068.73

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Solution

The fourth proportional to 408,551.48, 612,925.64 and 128,068.73 is: 192,133.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,551.48 : 612,925.64 = 128,068.73 : x
  2. Step 2: Convert to fraction form
    408,551.48/612,925.64 = 128,068.73/x
  3. Step 3: Cross multiply
    408,551.48x = 612,925.64 × 128,068.73
  4. Step 4: Simplify right side
    408,551.48x = 78,496,610,151.72
  5. Step 5: Solve for x
    x = 78,496,610,151.72/408,551.48
  6. Step 6: Final answer
    x = 192,133.95

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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.