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Finding the Fourth Proportional to 72,655.96, 108,985.99 and 20,065.45

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Solution

The fourth proportional to 72,655.96, 108,985.99 and 20,065.45 is: 30,098.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,655.96 : 108,985.99 = 20,065.45 : x
  2. Step 2: Convert to fraction form
    72,655.96/108,985.99 = 20,065.45/x
  3. Step 3: Cross multiply
    72,655.96x = 108,985.99 × 20,065.45
  4. Step 4: Simplify right side
    72,655.96x = 2,186,852,610.42
  5. Step 5: Solve for x
    x = 2,186,852,610.42/72,655.96
  6. Step 6: Final answer
    x = 30,098.74

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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.