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Finding the Fourth Proportional to 72,059.53, 99,438.03 and 40,230.46

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Solution

The fourth proportional to 72,059.53, 99,438.03 and 40,230.46 is: 55,515.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,059.53 : 99,438.03 = 40,230.46 : x
  2. Step 2: Convert to fraction form
    72,059.53/99,438.03 = 40,230.46/x
  3. Step 3: Cross multiply
    72,059.53x = 99,438.03 × 40,230.46
  4. Step 4: Simplify right side
    72,059.53x = 4,000,437,688.39
  5. Step 5: Solve for x
    x = 4,000,437,688.39/72,059.53
  6. Step 6: Final answer
    x = 55,515.73

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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.