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Finding the Fourth Proportional to 72,652.40, 108,978.35 and 19,344.38

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Solution

The fourth proportional to 72,652.40, 108,978.35 and 19,344.38 is: 29,016.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,652.40 : 108,978.35 = 19,344.38 : x
  2. Step 2: Convert to fraction form
    72,652.40/108,978.35 = 19,344.38/x
  3. Step 3: Cross multiply
    72,652.40x = 108,978.35 × 19,344.38
  4. Step 4: Simplify right side
    72,652.40x = 2,108,118,614.17
  5. Step 5: Solve for x
    x = 2,108,118,614.17/72,652.40
  6. Step 6: Final answer
    x = 29,016.50

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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.