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Finding the Fourth Proportional to 66,043.92, 91,139.84 and 35,828.72

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Solution

The fourth proportional to 66,043.92, 91,139.84 and 35,828.72 is: 49,443.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,043.92 : 91,139.84 = 35,828.72 : x
  2. Step 2: Convert to fraction form
    66,043.92/91,139.84 = 35,828.72/x
  3. Step 3: Cross multiply
    66,043.92x = 91,139.84 × 35,828.72
  4. Step 4: Simplify right side
    66,043.92x = 3,265,423,808.20
  5. Step 5: Solve for x
    x = 3,265,423,808.20/66,043.92
  6. Step 6: Final answer
    x = 49,443.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.