Home / 319,928.86-479,980.95-139,981.66

Finding the Fourth Proportional to 319,928.86, 479,980.95 and 139,981.66

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Solution

The fourth proportional to 319,928.86, 479,980.95 and 139,981.66 is: 210,010.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,928.86 : 479,980.95 = 139,981.66 : x
  2. Step 2: Convert to fraction form
    319,928.86/479,980.95 = 139,981.66/x
  3. Step 3: Cross multiply
    319,928.86x = 479,980.95 × 139,981.66
  4. Step 4: Simplify right side
    319,928.86x = 67,188,530,955.54
  5. Step 5: Solve for x
    x = 67,188,530,955.54/319,928.86
  6. Step 6: Final answer
    x = 210,010.85

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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.