Home / 72,135.76-99,540.24-40,303.96

Finding the Fourth Proportional to 72,135.76, 99,540.24 and 40,303.96

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Solution

The fourth proportional to 72,135.76, 99,540.24 and 40,303.96 is: 55,615.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,135.76 : 99,540.24 = 40,303.96 : x
  2. Step 2: Convert to fraction form
    72,135.76/99,540.24 = 40,303.96/x
  3. Step 3: Cross multiply
    72,135.76x = 99,540.24 × 40,303.96
  4. Step 4: Simplify right side
    72,135.76x = 4,011,865,851.35
  5. Step 5: Solve for x
    x = 4,011,865,851.35/72,135.76
  6. Step 6: Final answer
    x = 55,615.49

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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.