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Finding the Fourth Proportional to 74,869.21, 112,238.21 and 28,154.89

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Solution

The fourth proportional to 74,869.21, 112,238.21 and 28,154.89 is: 42,207.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,869.21 : 112,238.21 = 28,154.89 : x
  2. Step 2: Convert to fraction form
    74,869.21/112,238.21 = 28,154.89/x
  3. Step 3: Cross multiply
    74,869.21x = 112,238.21 × 28,154.89
  4. Step 4: Simplify right side
    74,869.21x = 3,160,054,508.66
  5. Step 5: Solve for x
    x = 3,160,054,508.66/74,869.21
  6. Step 6: Final answer
    x = 42,207.66

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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.