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Finding the Fourth Proportional to 128,770.65, 192,991.95 and 93,669.30

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Solution

The fourth proportional to 128,770.65, 192,991.95 and 93,669.30 is: 140,384.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,770.65 : 192,991.95 = 93,669.30 : x
  2. Step 2: Convert to fraction form
    128,770.65/192,991.95 = 93,669.30/x
  3. Step 3: Cross multiply
    128,770.65x = 192,991.95 × 93,669.30
  4. Step 4: Simplify right side
    128,770.65x = 18,077,420,862.14
  5. Step 5: Solve for x
    x = 18,077,420,862.14/128,770.65
  6. Step 6: Final answer
    x = 140,384.64

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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.