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Finding the Fourth Proportional to 74,898.40, 112,477.20 and 39,906.40

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Solution

The fourth proportional to 74,898.40, 112,477.20 and 39,906.40 is: 59,928.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,898.40 : 112,477.20 = 39,906.40 : x
  2. Step 2: Convert to fraction form
    74,898.40/112,477.20 = 39,906.40/x
  3. Step 3: Cross multiply
    74,898.40x = 112,477.20 × 39,906.40
  4. Step 4: Simplify right side
    74,898.40x = 4,488,560,134.08
  5. Step 5: Solve for x
    x = 4,488,560,134.08/74,898.40
  6. Step 6: Final answer
    x = 59,928.65

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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.