Home / 72,137.10-99,548.63-40,305.66

Finding the Fourth Proportional to 72,137.10, 99,548.63 and 40,305.66

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Solution

The fourth proportional to 72,137.10, 99,548.63 and 40,305.66 is: 55,621.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,137.10 : 99,548.63 = 40,305.66 : x
  2. Step 2: Convert to fraction form
    72,137.10/99,548.63 = 40,305.66/x
  3. Step 3: Cross multiply
    72,137.10x = 99,548.63 × 40,305.66
  4. Step 4: Simplify right side
    72,137.10x = 4,012,373,234.25
  5. Step 5: Solve for x
    x = 4,012,373,234.25/72,137.10
  6. Step 6: Final answer
    x = 55,621.49

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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.