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Finding the Fourth Proportional to 74,008.58, 111,019.88 and 20,700.57

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Solution

The fourth proportional to 74,008.58, 111,019.88 and 20,700.57 is: 31,052.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,008.58 : 111,019.88 = 20,700.57 : x
  2. Step 2: Convert to fraction form
    74,008.58/111,019.88 = 20,700.57/x
  3. Step 3: Cross multiply
    74,008.58x = 111,019.88 × 20,700.57
  4. Step 4: Simplify right side
    74,008.58x = 2,298,174,849.08
  5. Step 5: Solve for x
    x = 2,298,174,849.08/74,008.58
  6. Step 6: Final answer
    x = 31,052.82

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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.