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Finding the Fourth Proportional to 128,467.62, 192,645.54 and 61,019.19

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Solution

The fourth proportional to 128,467.62, 192,645.54 and 61,019.19 is: 91,502.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,467.62 : 192,645.54 = 61,019.19 : x
  2. Step 2: Convert to fraction form
    128,467.62/192,645.54 = 61,019.19/x
  3. Step 3: Cross multiply
    128,467.62x = 192,645.54 × 61,019.19
  4. Step 4: Simplify right side
    128,467.62x = 11,755,074,807.91
  5. Step 5: Solve for x
    x = 11,755,074,807.91/128,467.62
  6. Step 6: Final answer
    x = 91,502.24

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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.