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Finding the Fourth Proportional to 72,295.93, 108,440.71 and 19,705.41

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Solution

The fourth proportional to 72,295.93, 108,440.71 and 19,705.41 is: 29,557.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,295.93 : 108,440.71 = 19,705.41 : x
  2. Step 2: Convert to fraction form
    72,295.93/108,440.71 = 19,705.41/x
  3. Step 3: Cross multiply
    72,295.93x = 108,440.71 × 19,705.41
  4. Step 4: Simplify right side
    72,295.93x = 2,136,868,651.24
  5. Step 5: Solve for x
    x = 2,136,868,651.24/72,295.93
  6. Step 6: Final answer
    x = 29,557.25

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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.