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Finding the Fourth Proportional to 78,126.11, 107,806.32 and 43,664.48

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Solution

The fourth proportional to 78,126.11, 107,806.32 and 43,664.48 is: 60,252.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,126.11 : 107,806.32 = 43,664.48 : x
  2. Step 2: Convert to fraction form
    78,126.11/107,806.32 = 43,664.48/x
  3. Step 3: Cross multiply
    78,126.11x = 107,806.32 × 43,664.48
  4. Step 4: Simplify right side
    78,126.11x = 4,707,306,364.48
  5. Step 5: Solve for x
    x = 4,707,306,364.48/78,126.11
  6. Step 6: Final answer
    x = 60,252.67

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1.5x scale

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.