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Finding the Fourth Proportional to 72,577.93, 100,163.86 and 40,318.82

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Solution

The fourth proportional to 72,577.93, 100,163.86 and 40,318.82 is: 55,643.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,577.93 : 100,163.86 = 40,318.82 : x
  2. Step 2: Convert to fraction form
    72,577.93/100,163.86 = 40,318.82/x
  3. Step 3: Cross multiply
    72,577.93x = 100,163.86 × 40,318.82
  4. Step 4: Simplify right side
    72,577.93x = 4,038,489,017.46
  5. Step 5: Solve for x
    x = 4,038,489,017.46/72,577.93
  6. Step 6: Final answer
    x = 55,643.48

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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.