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Finding the Fourth Proportional to 72,523.68, 108,710.68 and 30,428.21

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Solution

The fourth proportional to 72,523.68, 108,710.68 and 30,428.21 is: 45,610.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,523.68 : 108,710.68 = 30,428.21 : x
  2. Step 2: Convert to fraction form
    72,523.68/108,710.68 = 30,428.21/x
  3. Step 3: Cross multiply
    72,523.68x = 108,710.68 × 30,428.21
  4. Step 4: Simplify right side
    72,523.68x = 3,307,871,400.28
  5. Step 5: Solve for x
    x = 3,307,871,400.28/72,523.68
  6. Step 6: Final answer
    x = 45,610.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.