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Finding the Fourth Proportional to 78,800.16, 108,709.92 and 51,908.16

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Solution

The fourth proportional to 78,800.16, 108,709.92 and 51,908.16 is: 71,610.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,800.16 : 108,709.92 = 51,908.16 : x
  2. Step 2: Convert to fraction form
    78,800.16/108,709.92 = 51,908.16/x
  3. Step 3: Cross multiply
    78,800.16x = 108,709.92 × 51,908.16
  4. Step 4: Simplify right side
    78,800.16x = 5,642,931,920.95
  5. Step 5: Solve for x
    x = 5,642,931,920.95/78,800.16
  6. Step 6: Final answer
    x = 71,610.67

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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.