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Finding the Fourth Proportional to 72,477.30, 100,018.50 and 40,216.82

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Solution

The fourth proportional to 72,477.30, 100,018.50 and 40,216.82 is: 55,499.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,477.30 : 100,018.50 = 40,216.82 : x
  2. Step 2: Convert to fraction form
    72,477.30/100,018.50 = 40,216.82/x
  3. Step 3: Cross multiply
    72,477.30x = 100,018.50 × 40,216.82
  4. Step 4: Simplify right side
    72,477.30x = 4,022,425,660.58
  5. Step 5: Solve for x
    x = 4,022,425,660.58/72,477.30
  6. Step 6: Final answer
    x = 55,499.11

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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.