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Finding the Fourth Proportional to 112,501.76, 168,669.32 and 68,118.08

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Solution

The fourth proportional to 112,501.76, 168,669.32 and 68,118.08 is: 102,126.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,501.76 : 168,669.32 = 68,118.08 : x
  2. Step 2: Convert to fraction form
    112,501.76/168,669.32 = 68,118.08/x
  3. Step 3: Cross multiply
    112,501.76x = 168,669.32 × 68,118.08
  4. Step 4: Simplify right side
    112,501.76x = 11,489,430,233.31
  5. Step 5: Solve for x
    x = 11,489,430,233.31/112,501.76
  6. Step 6: Final answer
    x = 102,126.67

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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.