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Finding the Fourth Proportional to 72,745.54, 109,117.88 and 18,710.14

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Solution

The fourth proportional to 72,745.54, 109,117.88 and 18,710.14 is: 28,065.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,745.54 : 109,117.88 = 18,710.14 : x
  2. Step 2: Convert to fraction form
    72,745.54/109,117.88 = 18,710.14/x
  3. Step 3: Cross multiply
    72,745.54x = 109,117.88 × 18,710.14
  4. Step 4: Simplify right side
    72,745.54x = 2,041,610,811.30
  5. Step 5: Solve for x
    x = 2,041,610,811.30/72,745.54
  6. Step 6: Final answer
    x = 28,065.10

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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.