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Finding the Fourth Proportional to 78,697.05, 108,472.23 and 55,697.24

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Solution

The fourth proportional to 78,697.05, 108,472.23 and 55,697.24 is: 76,770.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,697.05 : 108,472.23 = 55,697.24 : x
  2. Step 2: Convert to fraction form
    78,697.05/108,472.23 = 55,697.24/x
  3. Step 3: Cross multiply
    78,697.05x = 108,472.23 × 55,697.24
  4. Step 4: Simplify right side
    78,697.05x = 6,041,603,285.28
  5. Step 5: Solve for x
    x = 6,041,603,285.28/78,697.05
  6. Step 6: Final answer
    x = 76,770.39

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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.