Home / 72,278.15-108,220.40-56,211.90

Finding the Fourth Proportional to 72,278.15, 108,220.40 and 56,211.90

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Solution

The fourth proportional to 72,278.15, 108,220.40 and 56,211.90 is: 84,164.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,278.15 : 108,220.40 = 56,211.90 : x
  2. Step 2: Convert to fraction form
    72,278.15/108,220.40 = 56,211.90/x
  3. Step 3: Cross multiply
    72,278.15x = 108,220.40 × 56,211.90
  4. Step 4: Simplify right side
    72,278.15x = 6,083,274,021.70
  5. Step 5: Solve for x
    x = 6,083,274,021.70/72,278.15
  6. Step 6: Final answer
    x = 84,164.78

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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.