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Finding the Fourth Proportional to 72,586.08, 100,185.12 and 47,421.12

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Solution

The fourth proportional to 72,586.08, 100,185.12 and 47,421.12 is: 65,451.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,586.08 : 100,185.12 = 47,421.12 : x
  2. Step 2: Convert to fraction form
    72,586.08/100,185.12 = 47,421.12/x
  3. Step 3: Cross multiply
    72,586.08x = 100,185.12 × 47,421.12
  4. Step 4: Simplify right side
    72,586.08x = 4,750,890,597.73
  5. Step 5: Solve for x
    x = 4,750,890,597.73/72,586.08
  6. Step 6: Final answer
    x = 65,451.81

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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.