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Finding the Fourth Proportional to 73,903.60, 110,871.80 and 21,309

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Solution

The fourth proportional to 73,903.60, 110,871.80 and 21,309 is: 31,968.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,903.60 : 110,871.80 = 21,309 : x
  2. Step 2: Convert to fraction form
    73,903.60/110,871.80 = 21,309/x
  3. Step 3: Cross multiply
    73,903.60x = 110,871.80 × 21,309
  4. Step 4: Simplify right side
    73,903.60x = 2,362,567,186.20
  5. Step 5: Solve for x
    x = 2,362,567,186.20/73,903.60
  6. Step 6: Final answer
    x = 31,968.23

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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.