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Finding the Fourth Proportional to 319,803.94, 479,618.34 and 120,108.88

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Solution

The fourth proportional to 319,803.94, 479,618.34 and 120,108.88 is: 180,130.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,803.94 : 479,618.34 = 120,108.88 : x
  2. Step 2: Convert to fraction form
    319,803.94/479,618.34 = 120,108.88/x
  3. Step 3: Cross multiply
    319,803.94x = 479,618.34 × 120,108.88
  4. Step 4: Simplify right side
    319,803.94x = 57,606,421,644.86
  5. Step 5: Solve for x
    x = 57,606,421,644.86/319,803.94
  6. Step 6: Final answer
    x = 180,130.43

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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.