Home / 268,403.34-402,505.38-78,811.50

Finding the Fourth Proportional to 268,403.34, 402,505.38 and 78,811.50

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Solution

The fourth proportional to 268,403.34, 402,505.38 and 78,811.50 is: 118,188.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,403.34 : 402,505.38 = 78,811.50 : x
  2. Step 2: Convert to fraction form
    268,403.34/402,505.38 = 78,811.50/x
  3. Step 3: Cross multiply
    268,403.34x = 402,505.38 × 78,811.50
  4. Step 4: Simplify right side
    268,403.34x = 31,722,052,755.87
  5. Step 5: Solve for x
    x = 31,722,052,755.87/268,403.34
  6. Step 6: Final answer
    x = 118,188.00

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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.