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Finding the Fourth Proportional to 72,024.95, 99,399.93 and 39,765.79

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Solution

The fourth proportional to 72,024.95, 99,399.93 and 39,765.79 is: 54,879.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,024.95 : 99,399.93 = 39,765.79 : x
  2. Step 2: Convert to fraction form
    72,024.95/99,399.93 = 39,765.79/x
  3. Step 3: Cross multiply
    72,024.95x = 99,399.93 × 39,765.79
  4. Step 4: Simplify right side
    72,024.95x = 3,952,716,493.92
  5. Step 5: Solve for x
    x = 3,952,716,493.92/72,024.95
  6. Step 6: Final answer
    x = 54,879.83

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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.