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Finding the Fourth Proportional to 74,928.30, 112,435.65 and 28,214.70

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Solution

The fourth proportional to 74,928.30, 112,435.65 and 28,214.70 is: 42,338.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,928.30 : 112,435.65 = 28,214.70 : x
  2. Step 2: Convert to fraction form
    74,928.30/112,435.65 = 28,214.70/x
  3. Step 3: Cross multiply
    74,928.30x = 112,435.65 × 28,214.70
  4. Step 4: Simplify right side
    74,928.30x = 3,172,338,134.06
  5. Step 5: Solve for x
    x = 3,172,338,134.06/74,928.30
  6. Step 6: Final answer
    x = 42,338.32

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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.