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Finding the Fourth Proportional to 66,358.56, 99,489.04 and 31,279.20

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Solution

The fourth proportional to 66,358.56, 99,489.04 and 31,279.20 is: 46,895.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,358.56 : 99,489.04 = 31,279.20 : x
  2. Step 2: Convert to fraction form
    66,358.56/99,489.04 = 31,279.20/x
  3. Step 3: Cross multiply
    66,358.56x = 99,489.04 × 31,279.20
  4. Step 4: Simplify right side
    66,358.56x = 3,111,937,579.97
  5. Step 5: Solve for x
    x = 3,111,937,579.97/66,358.56
  6. Step 6: Final answer
    x = 46,895.80

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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.