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Finding the Fourth Proportional to 78,795.54, 109,197.86 and 77,300.28

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Solution

The fourth proportional to 78,795.54, 109,197.86 and 77,300.28 is: 107,125.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,795.54 : 109,197.86 = 77,300.28 : x
  2. Step 2: Convert to fraction form
    78,795.54/109,197.86 = 77,300.28/x
  3. Step 3: Cross multiply
    78,795.54x = 109,197.86 × 77,300.28
  4. Step 4: Simplify right side
    78,795.54x = 8,441,025,153.40
  5. Step 5: Solve for x
    x = 8,441,025,153.40/78,795.54
  6. Step 6: Final answer
    x = 107,125.67

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.