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Finding the Fourth Proportional to 72,656.93, 108,990 and 19,348.04

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Solution

The fourth proportional to 72,656.93, 108,990 and 19,348.04 is: 29,023.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,656.93 : 108,990 = 19,348.04 : x
  2. Step 2: Convert to fraction form
    72,656.93/108,990 = 19,348.04/x
  3. Step 3: Cross multiply
    72,656.93x = 108,990 × 19,348.04
  4. Step 4: Simplify right side
    72,656.93x = 2,108,742,334.65
  5. Step 5: Solve for x
    x = 2,108,742,334.65/72,656.93
  6. Step 6: Final answer
    x = 29,023.28

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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.