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Finding the Fourth Proportional to 72,317.80, 108,390.30 and 37,239.40

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Solution

The fourth proportional to 72,317.80, 108,390.30 and 37,239.40 is: 55,814.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,317.80 : 108,390.30 = 37,239.40 : x
  2. Step 2: Convert to fraction form
    72,317.80/108,390.30 = 37,239.40/x
  3. Step 3: Cross multiply
    72,317.80x = 108,390.30 × 37,239.40
  4. Step 4: Simplify right side
    72,317.80x = 4,036,389,737.82
  5. Step 5: Solve for x
    x = 4,036,389,737.82/72,317.80
  6. Step 6: Final answer
    x = 55,814.61

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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.