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Finding the Fourth Proportional to 72,577.26, 108,866.43 and 19,989.63

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Solution

The fourth proportional to 72,577.26, 108,866.43 and 19,989.63 is: 29,984.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,577.26 : 108,866.43 = 19,989.63 : x
  2. Step 2: Convert to fraction form
    72,577.26/108,866.43 = 19,989.63/x
  3. Step 3: Cross multiply
    72,577.26x = 108,866.43 × 19,989.63
  4. Step 4: Simplify right side
    72,577.26x = 2,176,199,655.12
  5. Step 5: Solve for x
    x = 2,176,199,655.12/72,577.26
  6. Step 6: Final answer
    x = 29,984.59

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1.5x scale

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.