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Finding the Fourth Proportional to 128,929.92, 193,315.24 and 44,670.48

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Solution

The fourth proportional to 128,929.92, 193,315.24 and 44,670.48 is: 66,978.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,929.92 : 193,315.24 = 44,670.48 : x
  2. Step 2: Convert to fraction form
    128,929.92/193,315.24 = 44,670.48/x
  3. Step 3: Cross multiply
    128,929.92x = 193,315.24 × 44,670.48
  4. Step 4: Simplify right side
    128,929.92x = 8,635,484,562.12
  5. Step 5: Solve for x
    x = 8,635,484,562.12/128,929.92
  6. Step 6: Final answer
    x = 66,978.13

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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.