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Finding the Fourth Proportional to 118,598.08, 163,594.08 and 78,311.92

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Solution

The fourth proportional to 118,598.08, 163,594.08 and 78,311.92 is: 108,023.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,598.08 : 163,594.08 = 78,311.92 : x
  2. Step 2: Convert to fraction form
    118,598.08/163,594.08 = 78,311.92/x
  3. Step 3: Cross multiply
    118,598.08x = 163,594.08 × 78,311.92
  4. Step 4: Simplify right side
    118,598.08x = 12,811,366,505.43
  5. Step 5: Solve for x
    x = 12,811,366,505.43/118,598.08
  6. Step 6: Final answer
    x = 108,023.39

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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.