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Finding the Fourth Proportional to 128,473.16, 192,738.96 and 69,307.52

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Solution

The fourth proportional to 128,473.16, 192,738.96 and 69,307.52 is: 103,977.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,473.16 : 192,738.96 = 69,307.52 : x
  2. Step 2: Convert to fraction form
    128,473.16/192,738.96 = 69,307.52/x
  3. Step 3: Cross multiply
    128,473.16x = 192,738.96 × 69,307.52
  4. Step 4: Simplify right side
    128,473.16x = 13,358,259,324.98
  5. Step 5: Solve for x
    x = 13,358,259,324.98/128,473.16
  6. Step 6: Final answer
    x = 103,977.04

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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.