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Finding the Fourth Proportional to 109,148.80, 163,690.80 and 42,550.60

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Solution

The fourth proportional to 109,148.80, 163,690.80 and 42,550.60 is: 63,813.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,148.80 : 163,690.80 = 42,550.60 : x
  2. Step 2: Convert to fraction form
    109,148.80/163,690.80 = 42,550.60/x
  3. Step 3: Cross multiply
    109,148.80x = 163,690.80 × 42,550.60
  4. Step 4: Simplify right side
    109,148.80x = 6,965,141,754.48
  5. Step 5: Solve for x
    x = 6,965,141,754.48/109,148.80
  6. Step 6: Final answer
    x = 63,813.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.