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Finding the Fourth Proportional to 72,242.47, 108,352.77 and 19,656.06

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Solution

The fourth proportional to 72,242.47, 108,352.77 and 19,656.06 is: 29,481.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,242.47 : 108,352.77 = 19,656.06 : x
  2. Step 2: Convert to fraction form
    72,242.47/108,352.77 = 19,656.06/x
  3. Step 3: Cross multiply
    72,242.47x = 108,352.77 × 19,656.06
  4. Step 4: Simplify right side
    72,242.47x = 2,129,788,548.29
  5. Step 5: Solve for x
    x = 2,129,788,548.29/72,242.47
  6. Step 6: Final answer
    x = 29,481.11

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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.