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Finding the Fourth Proportional to 129,893.15, 194,901.65 and 89,973.65

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Solution

The fourth proportional to 129,893.15, 194,901.65 and 89,973.65 is: 135,003.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,893.15 : 194,901.65 = 89,973.65 : x
  2. Step 2: Convert to fraction form
    129,893.15/194,901.65 = 89,973.65/x
  3. Step 3: Cross multiply
    129,893.15x = 194,901.65 × 89,973.65
  4. Step 4: Simplify right side
    129,893.15x = 17,536,011,417.15
  5. Step 5: Solve for x
    x = 17,536,011,417.15/129,893.15
  6. Step 6: Final answer
    x = 135,003.36

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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.