Home / 218,237.20-327,355.80-78,000.40

Finding the Fourth Proportional to 218,237.20, 327,355.80 and 78,000.40

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Solution

The fourth proportional to 218,237.20, 327,355.80 and 78,000.40 is: 117,000.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,237.20 : 327,355.80 = 78,000.40 : x
  2. Step 2: Convert to fraction form
    218,237.20/327,355.80 = 78,000.40/x
  3. Step 3: Cross multiply
    218,237.20x = 327,355.80 × 78,000.40
  4. Step 4: Simplify right side
    218,237.20x = 25,533,883,342.32
  5. Step 5: Solve for x
    x = 25,533,883,342.32/218,237.20
  6. Step 6: Final answer
    x = 117,000.60

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1.5x scale

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.