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Finding the Fourth Proportional to 72,763.88, 100,419.93 and 40,935.13

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Solution

The fourth proportional to 72,763.88, 100,419.93 and 40,935.13 is: 56,493.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,763.88 : 100,419.93 = 40,935.13 : x
  2. Step 2: Convert to fraction form
    72,763.88/100,419.93 = 40,935.13/x
  3. Step 3: Cross multiply
    72,763.88x = 100,419.93 × 40,935.13
  4. Step 4: Simplify right side
    72,763.88x = 4,110,702,638.09
  5. Step 5: Solve for x
    x = 4,110,702,638.09/72,763.88
  6. Step 6: Final answer
    x = 56,493.73

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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.