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Finding the Fourth Proportional to 72,778.30, 100,410.03 and 59,326.43

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Solution

The fourth proportional to 72,778.30, 100,410.03 and 59,326.43 is: 81,850.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,778.30 : 100,410.03 = 59,326.43 : x
  2. Step 2: Convert to fraction form
    72,778.30/100,410.03 = 59,326.43/x
  3. Step 3: Cross multiply
    72,778.30x = 100,410.03 × 59,326.43
  4. Step 4: Simplify right side
    72,778.30x = 5,956,968,114.04
  5. Step 5: Solve for x
    x = 5,956,968,114.04/72,778.30
  6. Step 6: Final answer
    x = 81,850.89

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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.