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Finding the Fourth Proportional to 128,386.92, 192,596.82 and 39,649.44

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Solution

The fourth proportional to 128,386.92, 192,596.82 and 39,649.44 is: 59,479.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,386.92 : 192,596.82 = 39,649.44 : x
  2. Step 2: Convert to fraction form
    128,386.92/192,596.82 = 39,649.44/x
  3. Step 3: Cross multiply
    128,386.92x = 192,596.82 × 39,649.44
  4. Step 4: Simplify right side
    128,386.92x = 7,636,356,058.78
  5. Step 5: Solve for x
    x = 7,636,356,058.78/128,386.92
  6. Step 6: Final answer
    x = 59,479.24

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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.