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Finding the Fourth Proportional to 78,698.42, 108,600.66 and 42,887.67

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Solution

The fourth proportional to 78,698.42, 108,600.66 and 42,887.67 is: 59,183.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,698.42 : 108,600.66 = 42,887.67 : x
  2. Step 2: Convert to fraction form
    78,698.42/108,600.66 = 42,887.67/x
  3. Step 3: Cross multiply
    78,698.42x = 108,600.66 × 42,887.67
  4. Step 4: Simplify right side
    78,698.42x = 4,657,629,267.86
  5. Step 5: Solve for x
    x = 4,657,629,267.86/78,698.42
  6. Step 6: Final answer
    x = 59,183.26

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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.