Home / 72,770.23-100,420.31-40,503.78

Finding the Fourth Proportional to 72,770.23, 100,420.31 and 40,503.78

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Solution

The fourth proportional to 72,770.23, 100,420.31 and 40,503.78 is: 55,893.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,770.23 : 100,420.31 = 40,503.78 : x
  2. Step 2: Convert to fraction form
    72,770.23/100,420.31 = 40,503.78/x
  3. Step 3: Cross multiply
    72,770.23x = 100,420.31 × 40,503.78
  4. Step 4: Simplify right side
    72,770.23x = 4,067,402,017.20
  5. Step 5: Solve for x
    x = 4,067,402,017.20/72,770.23
  6. Step 6: Final answer
    x = 55,893.76

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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.