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Finding the Fourth Proportional to 109,116.80, 163,675.20 and 81,468.80

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Solution

The fourth proportional to 109,116.80, 163,675.20 and 81,468.80 is: 122,203.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,116.80 : 163,675.20 = 81,468.80 : x
  2. Step 2: Convert to fraction form
    109,116.80/163,675.20 = 81,468.80/x
  3. Step 3: Cross multiply
    109,116.80x = 163,675.20 × 81,468.80
  4. Step 4: Simplify right side
    109,116.80x = 13,334,422,133.76
  5. Step 5: Solve for x
    x = 13,334,422,133.76/109,116.80
  6. Step 6: Final answer
    x = 122,203.20

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1.5x scale

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.