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Finding the Fourth Proportional to 74,135.05, 111,210.01 and 20,827.15

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Solution

The fourth proportional to 74,135.05, 111,210.01 and 20,827.15 is: 31,242.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,135.05 : 111,210.01 = 20,827.15 : x
  2. Step 2: Convert to fraction form
    74,135.05/111,210.01 = 20,827.15/x
  3. Step 3: Cross multiply
    74,135.05x = 111,210.01 × 20,827.15
  4. Step 4: Simplify right side
    74,135.05x = 2,316,187,659.61
  5. Step 5: Solve for x
    x = 2,316,187,659.61/74,135.05
  6. Step 6: Final answer
    x = 31,242.82

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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.