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Finding the Fourth Proportional to 73,989.40, 110,992.20 and 71,656.60

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Solution

The fourth proportional to 73,989.40, 110,992.20 and 71,656.60 is: 107,492.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,989.40 : 110,992.20 = 71,656.60 : x
  2. Step 2: Convert to fraction form
    73,989.40/110,992.20 = 71,656.60/x
  3. Step 3: Cross multiply
    73,989.40x = 110,992.20 × 71,656.60
  4. Step 4: Simplify right side
    73,989.40x = 7,953,323,678.52
  5. Step 5: Solve for x
    x = 7,953,323,678.52/73,989.40
  6. Step 6: Final answer
    x = 107,492.74

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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.