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Finding the Fourth Proportional to 128,164.65, 192,202.45 and 71,325.29

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Solution

The fourth proportional to 128,164.65, 192,202.45 and 71,325.29 is: 106,963.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,164.65 : 192,202.45 = 71,325.29 : x
  2. Step 2: Convert to fraction form
    128,164.65/192,202.45 = 71,325.29/x
  3. Step 3: Cross multiply
    128,164.65x = 192,202.45 × 71,325.29
  4. Step 4: Simplify right side
    128,164.65x = 13,708,896,143.78
  5. Step 5: Solve for x
    x = 13,708,896,143.78/128,164.65
  6. Step 6: Final answer
    x = 106,963.16

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1.5x scale

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.