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Finding the Fourth Proportional to 72,334.68, 99,719.10 and 53,180.64

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Solution

The fourth proportional to 72,334.68, 99,719.10 and 53,180.64 is: 73,313.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,334.68 : 99,719.10 = 53,180.64 : x
  2. Step 2: Convert to fraction form
    72,334.68/99,719.10 = 53,180.64/x
  3. Step 3: Cross multiply
    72,334.68x = 99,719.10 × 53,180.64
  4. Step 4: Simplify right side
    72,334.68x = 5,303,125,558.22
  5. Step 5: Solve for x
    x = 5,303,125,558.22/72,334.68
  6. Step 6: Final answer
    x = 73,313.73

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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.