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Finding the Fourth Proportional to 128,449.80, 192,693.06 and 39,711.06

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Solution

The fourth proportional to 128,449.80, 192,693.06 and 39,711.06 is: 59,572.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,449.80 : 192,693.06 = 39,711.06 : x
  2. Step 2: Convert to fraction form
    128,449.80/192,693.06 = 39,711.06/x
  3. Step 3: Cross multiply
    128,449.80x = 192,693.06 × 39,711.06
  4. Step 4: Simplify right side
    128,449.80x = 7,652,045,667.24
  5. Step 5: Solve for x
    x = 7,652,045,667.24/128,449.80
  6. Step 6: Final answer
    x = 59,572.27

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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.