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Finding the Fourth Proportional to 72,163.63, 99,585.16 and 39,900.49

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Solution

The fourth proportional to 72,163.63, 99,585.16 and 39,900.49 is: 55,062.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,163.63 : 99,585.16 = 39,900.49 : x
  2. Step 2: Convert to fraction form
    72,163.63/99,585.16 = 39,900.49/x
  3. Step 3: Cross multiply
    72,163.63x = 99,585.16 × 39,900.49
  4. Step 4: Simplify right side
    72,163.63x = 3,973,496,248.08
  5. Step 5: Solve for x
    x = 3,973,496,248.08/72,163.63
  6. Step 6: Final answer
    x = 55,062.31

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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.