Home / 115,999.20-173,998.80-78,674.40

Finding the Fourth Proportional to 115,999.20, 173,998.80 and 78,674.40

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Solution

The fourth proportional to 115,999.20, 173,998.80 and 78,674.40 is: 118,011.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,999.20 : 173,998.80 = 78,674.40 : x
  2. Step 2: Convert to fraction form
    115,999.20/173,998.80 = 78,674.40/x
  3. Step 3: Cross multiply
    115,999.20x = 173,998.80 × 78,674.40
  4. Step 4: Simplify right side
    115,999.20x = 13,689,251,190.72
  5. Step 5: Solve for x
    x = 13,689,251,190.72/115,999.20
  6. Step 6: Final answer
    x = 118,011.60

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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.