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Finding the Fourth Proportional to 111,421.44, 153,761.76 and 63,674.64

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Solution

The fourth proportional to 111,421.44, 153,761.76 and 63,674.64 is: 87,871.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,421.44 : 153,761.76 = 63,674.64 : x
  2. Step 2: Convert to fraction form
    111,421.44/153,761.76 = 63,674.64/x
  3. Step 3: Cross multiply
    111,421.44x = 153,761.76 × 63,674.64
  4. Step 4: Simplify right side
    111,421.44x = 9,790,724,713.77
  5. Step 5: Solve for x
    x = 9,790,724,713.77/111,421.44
  6. Step 6: Final answer
    x = 87,871.10

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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.