Home / 78,212.86-107,925.67-47,999.45

Finding the Fourth Proportional to 78,212.86, 107,925.67 and 47,999.45

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Solution

The fourth proportional to 78,212.86, 107,925.67 and 47,999.45 is: 66,234.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,212.86 : 107,925.67 = 47,999.45 : x
  2. Step 2: Convert to fraction form
    78,212.86/107,925.67 = 47,999.45/x
  3. Step 3: Cross multiply
    78,212.86x = 107,925.67 × 47,999.45
  4. Step 4: Simplify right side
    78,212.86x = 5,180,372,860.70
  5. Step 5: Solve for x
    x = 5,180,372,860.70/78,212.86
  6. Step 6: Final answer
    x = 66,234.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.