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Finding the Fourth Proportional to 128,360.87, 192,459.29 and 61,668.31

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Solution

The fourth proportional to 128,360.87, 192,459.29 and 61,668.31 is: 92,463.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,360.87 : 192,459.29 = 61,668.31 : x
  2. Step 2: Convert to fraction form
    128,360.87/192,459.29 = 61,668.31/x
  3. Step 3: Cross multiply
    128,360.87x = 192,459.29 × 61,668.31
  4. Step 4: Simplify right side
    128,360.87x = 11,868,639,158.10
  5. Step 5: Solve for x
    x = 11,868,639,158.10/128,360.87
  6. Step 6: Final answer
    x = 92,463.06

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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.