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Finding the Fourth Proportional to 73,078.61, 100,918.12 and 69,098.42

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Solution

The fourth proportional to 73,078.61, 100,918.12 and 69,098.42 is: 95,421.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,078.61 : 100,918.12 = 69,098.42 : x
  2. Step 2: Convert to fraction form
    73,078.61/100,918.12 = 69,098.42/x
  3. Step 3: Cross multiply
    73,078.61x = 100,918.12 × 69,098.42
  4. Step 4: Simplify right side
    73,078.61x = 6,973,282,688.90
  5. Step 5: Solve for x
    x = 6,973,282,688.90/73,078.61
  6. Step 6: Final answer
    x = 95,421.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.