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Finding the Fourth Proportional to 319,776.55, 479,411.79 and 120,074.69

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Solution

The fourth proportional to 319,776.55, 479,411.79 and 120,074.69 is: 180,017.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,776.55 : 479,411.79 = 120,074.69 : x
  2. Step 2: Convert to fraction form
    319,776.55/479,411.79 = 120,074.69/x
  3. Step 3: Cross multiply
    319,776.55x = 479,411.79 × 120,074.69
  4. Step 4: Simplify right side
    319,776.55x = 57,565,222,066.60
  5. Step 5: Solve for x
    x = 57,565,222,066.60/319,776.55
  6. Step 6: Final answer
    x = 180,017.02

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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.